Well, I've recently tried to make my way up the ladder, and so far this team is the one I've had the most success with. However, I would always like to improve my team, which is why I'm submitting it for critique.
Tyranitar @ Choice Band
Trait: Sand Stream
EVs: 252HP/ 4 Def / 252 SpD
Careful Nature(+SpD, -SpA)
- Crunch
- Pursuit
- Superpower
- Stone Edge
Tyranitar is the harbinger of the sand storm, and his EV spread and item makes him double as a special soak and physical threat. I generally don't actually lead with him, as his slow speed can be a liability and I don't feel like having him instantly killed early in the game. Instead, he tends to be a switch in. One thing I don't like about this set up though is his lack of physical tankiness as well as the move Stone Edge, which has an 80% chance to miss.
Scizor @ Choice Band
Trait: Technician
EVs: 4 HP/ 252 Atk / 252 Spe
Adamant Nature (+Atk, -SpA)
- Bullet Punch
- Superpower
- Pursuit
- U-turn
Scizor seems to be in every team, mostly because he's very good at what he does. This is a pretty standard Choice Band Scizor set, acting as a dangerous revenge killer or hitting strong with a U-turn, and can act as a check towards Psychic and Dark types, as well as Terrakion. Overall, he's probably one of the most valuable members of the team.
Heatran @ Air Balloon
Trait: Flash Fire
EVs: 252 HP / 192 Def / 64 SpD
Calm Nature (+SpD, -Atk)
- Earth Power
- Lava Plume
- Roar
- Stealth Rock
Heatran acts as a fire-soak as well as a non-balloon Heatran counter. In addition, the EV spread gives this Heatran a decent amount of bulk, with 386 HP backed up by 296 Def / 290 SpD. The main reason for the given EV spread is becuase I'm much more of a fan of mixed walls. Due to all the swaps that Heatran inevitably produces, I like to use him as one of my two stealth rock setters.
Tentacruel @ Black Sludge
Trait: Rain Dish
EVs: 252 HP / 176 Def / 80 Spe
Timid Nature (+Spe, -Atk)
- Rapid Spin
- Scald
- Toxic Spikes
- Protect
While Tentacruel seems quite out of place on a sand team, made more noticeable by the fact that he's the only member of the team affected by the sandstorm, he acts as a very solid response to Rain teams, capable of solidly walling most of the pokemon found on them and setting up Toxic Spikes as well as spinning away various hazards. However, his lack of reliable recovery bothers me a lot but other rapid spinners don't fit the team. I've tried bulky Starmie, but it just doesn't have Tentacruels bulk, not can it set up hazards, and Donphan simply accentuates the team's weakness to water, while Forretress just makes the team defensively unbalanced, giving me not enough special tankiness. Tentacruel is the one I most want to replace, but I can't find a solid replacement.
Terrakion @ Salac Berry
Trait: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature (+Spe, -SpA)
- Swords Dance
- Substitute
- Close Combat
- Stone Edge
This guy has resulted in so many turnabout wins that it's ridiculous. He acts as my best physical sweeper, especially once his counters are out of the way. After a swords dance boost and with Salac berry popped, he can single-handedly sweep. Unfortunately, I have two issues with him. This current EV spread means that when using substitute three times, Terrakion will be at 26% HP. In all honesty, I don't like sweeping at 1% HP from the fourth substitute, even if it may be suitably dramatic. As a result, I tend to most use him if stealth rocks have been placed on my side of the field, meaning that I can safely hover around ~20% HP during my sweep instead of dangerously low. Also, he has the same problem as Tyranitar, in that his reliance on Stone Miss is a crutch.
Landorus-Therian @ Leftovers
Trait: Intimidate
EVs: 244 HP / 64 Atk / 200 Def
Adamant Nature (+Atk, -SpA)
- U-turn
- Stealth Rock
- Earthquake
- Rock Slide
I've fallen in love with this guy, as he's easily the best physical wall I've managed to find for this team. He does have a weakness to Ice and Water, but that's balanced out by various other members of the team. This Landorus-T set is actually pretty standard, with the exception of the removal of Stone Edge and replacing it with Rock Slide, which is much more reliable. The drop in power is very significant, but I'm relying on Landorus-T to be reliable, not neccesarily to do the damage. U-Turn is also nice, allowing some TurnTurn to occur between it and Scizor. Overall, this guy is easily my MVP.
I think that this team has two primary issues, the first of which being dealing with stall teams, and the second being hyper-offensive rain teams, as almost every member of my team has a weakness to water type moves, which is only balanced out by Tentacruel. However, relying solely on one pokemon to carry the team and soak up all the damage from rain teams when it has no reliable recovery is very painful. Any suggestions or improvements to this team are welcome :D

Tyranitar @ Choice Band
Trait: Sand Stream
EVs: 252HP/ 4 Def / 252 SpD
Careful Nature(+SpD, -SpA)
- Crunch
- Pursuit
- Superpower
- Stone Edge
Tyranitar is the harbinger of the sand storm, and his EV spread and item makes him double as a special soak and physical threat. I generally don't actually lead with him, as his slow speed can be a liability and I don't feel like having him instantly killed early in the game. Instead, he tends to be a switch in. One thing I don't like about this set up though is his lack of physical tankiness as well as the move Stone Edge, which has an 80% chance to miss.

Scizor @ Choice Band
Trait: Technician
EVs: 4 HP/ 252 Atk / 252 Spe
Adamant Nature (+Atk, -SpA)
- Bullet Punch
- Superpower
- Pursuit
- U-turn
Scizor seems to be in every team, mostly because he's very good at what he does. This is a pretty standard Choice Band Scizor set, acting as a dangerous revenge killer or hitting strong with a U-turn, and can act as a check towards Psychic and Dark types, as well as Terrakion. Overall, he's probably one of the most valuable members of the team.

Heatran @ Air Balloon
Trait: Flash Fire
EVs: 252 HP / 192 Def / 64 SpD
Calm Nature (+SpD, -Atk)
- Earth Power
- Lava Plume
- Roar
- Stealth Rock
Heatran acts as a fire-soak as well as a non-balloon Heatran counter. In addition, the EV spread gives this Heatran a decent amount of bulk, with 386 HP backed up by 296 Def / 290 SpD. The main reason for the given EV spread is becuase I'm much more of a fan of mixed walls. Due to all the swaps that Heatran inevitably produces, I like to use him as one of my two stealth rock setters.

Tentacruel @ Black Sludge
Trait: Rain Dish
EVs: 252 HP / 176 Def / 80 Spe
Timid Nature (+Spe, -Atk)
- Rapid Spin
- Scald
- Toxic Spikes
- Protect
While Tentacruel seems quite out of place on a sand team, made more noticeable by the fact that he's the only member of the team affected by the sandstorm, he acts as a very solid response to Rain teams, capable of solidly walling most of the pokemon found on them and setting up Toxic Spikes as well as spinning away various hazards. However, his lack of reliable recovery bothers me a lot but other rapid spinners don't fit the team. I've tried bulky Starmie, but it just doesn't have Tentacruels bulk, not can it set up hazards, and Donphan simply accentuates the team's weakness to water, while Forretress just makes the team defensively unbalanced, giving me not enough special tankiness. Tentacruel is the one I most want to replace, but I can't find a solid replacement.

Terrakion @ Salac Berry
Trait: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature (+Spe, -SpA)
- Swords Dance
- Substitute
- Close Combat
- Stone Edge
This guy has resulted in so many turnabout wins that it's ridiculous. He acts as my best physical sweeper, especially once his counters are out of the way. After a swords dance boost and with Salac berry popped, he can single-handedly sweep. Unfortunately, I have two issues with him. This current EV spread means that when using substitute three times, Terrakion will be at 26% HP. In all honesty, I don't like sweeping at 1% HP from the fourth substitute, even if it may be suitably dramatic. As a result, I tend to most use him if stealth rocks have been placed on my side of the field, meaning that I can safely hover around ~20% HP during my sweep instead of dangerously low. Also, he has the same problem as Tyranitar, in that his reliance on Stone Miss is a crutch.

Landorus-Therian @ Leftovers
Trait: Intimidate
EVs: 244 HP / 64 Atk / 200 Def
Adamant Nature (+Atk, -SpA)
- U-turn
- Stealth Rock
- Earthquake
- Rock Slide
I've fallen in love with this guy, as he's easily the best physical wall I've managed to find for this team. He does have a weakness to Ice and Water, but that's balanced out by various other members of the team. This Landorus-T set is actually pretty standard, with the exception of the removal of Stone Edge and replacing it with Rock Slide, which is much more reliable. The drop in power is very significant, but I'm relying on Landorus-T to be reliable, not neccesarily to do the damage. U-Turn is also nice, allowing some TurnTurn to occur between it and Scizor. Overall, this guy is easily my MVP.
I think that this team has two primary issues, the first of which being dealing with stall teams, and the second being hyper-offensive rain teams, as almost every member of my team has a weakness to water type moves, which is only balanced out by Tentacruel. However, relying solely on one pokemon to carry the team and soak up all the damage from rain teams when it has no reliable recovery is very painful. Any suggestions or improvements to this team are welcome :D