Rate my OU team please

[Cautious]

With this team, I either win really hard or lose really hard. Any suggestions on how to make a more consistent team?
Talonflame @ Choice Band
Ability: Gale Wings
EVs: 88 HP / 252 Atk / 168 Spd
Jolly Nature
- Brave Bird
- Flare Blitz
- Steel Wing
- U-turn

Gyarados @ Leftovers
Ability: Moxie
Shiny: Yes
EVs: 252 Spd / 252 Atk / 4 HP
Adamant Nature
- Waterfall
- Dragon Dance
- Earthquake
- Ice Fang

Aegislash @ Leftovers
Ability: Stance Change
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 Def
Brave Nature
- Swords Dance
- King's Shield
- Shadow Sneak
- Sacred Sword

Togekiss @ Leftovers
Ability: Serene Grace
EVs: 248 HP / 192 SAtk / 68 Spd
Modest Nature
- Air Slash
- Wish
- Defog
- Dazzling Gleam

Sceptile @ Sitrus Berry
Ability: Unburden
EVs: 4 HP / 252 SAtk / 252 Spd
Hasty Nature
- Leaf Storm
- Hidden Power [Ice]
- Focus Blast
- Earthquake

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 184 Def / 252 HP / 72 Spd
Impish Nature
- Earthquake
- Toxic
- Protect
- Substitute

 

[Attack Order]

Hi there, I see that you're new to Smogon! Make sure you read how to make a RMT. Also, try and add descriptions, so team raters can have a better sense on what you want your pokemon to do/what roles they play on your team.

On the team... Sceptile is not really good in higher tiers, as it is outclassed by many other grass types, such as Celebi, Mega Venusaur, and Ferrothorn. Since you don't have a mega evolution yet, maybe try adding Mega Venusaur over Sceptile?

Venusaur @ Venusaurite
Ability: Chlorophyll (Thick Fat)
IVs: 252 HP / 4 Def / 252 SpDef
Nature: Calm / Bold
- Synthesis
- Giga Drain
- Leech Seed
- Sludge Bomb

Also, why Wish+Defog Togekiss? Maybe this supportive set might be better as it spreads paralysis and makes it easier for Gyarados or Aegislash to sweep, as they are not extremely fast:

Togekiss @ Leftovers
Ability: Serene Grace
EVs: 252 HP / 252 SDef / 4 Def
Calm Nature
- Thunder Wave
- Air Slash
- Aura Sphere
- Roost

Air slash allows Togekiss to be annoying and it has a 60% chance of flinching due to Serene Grace. Aura Sphere hits Steel-type pokemon that would otherwise take pitiful damage from Air Slash.

Good luck with your team!

 

[Cautious]

For my Sceptile, I really like his ability where he looses an item, it doubles his speed. I've been thinking to replace him though as I found that leaf storm wasnt realiable at all. For togekiss, I needed someone with defog to clear our hazards for my talonflame and wish was also for healing my talonflame. Thanks for the suggestions, all help is appreciated