I know it's been mentioned before, but holy shit is ScarfJelli pro as fuck
Jellicent @ Choice Scarf
Trait: Water Absorb
EVs: 252 SAtk / 252 Spd / 4 HP
IVs: 0 Atk
- Water Spout
- Surf / Ice Beam
- Shadow Ball
- Trick / Ice Beam
This thing is a huge threat on Rain Teams, as it's Rain-Boosted Water Spouts at max HP are insanely powerful, especially if boosted by Politoed's Helping Hand. Since Choice Items seem to be rare (idk why), Jellicent is assured to outspeed most pokemon and hit them hard. What Jellicent has over Wailord in this spot is it's Ghost-typing and Water Absorb. Thanks to Water Absorb, it can heal itself from enemy and friendly Surfs, while it's Ghost-typing along with Water Absorb make it immune to 5 types of priority (Not counting Quick Attack because lolQuickAttack), including Fake Out. STAB Shadow Ball let it hit the Lati-twins and other Water-types for solid damage. Surf is there for those times where Jelli is low on HP. Trick can be used to cripple something before going down, while Ice Beam can be used to hit Grass- and Dragon-types SE. I use modest, but I haven't actually checked Speed Tiers yet, so idk what nature to use.
I haven't used this outside of Rain, but it should be obvious that Rain is it's best weather, since Rain Boosted Water Spouts will destroy things.
Speaking of Choice Scarfed pokemon, has anyone tried used ScarfTran under the Sun (I wish it didn't need Quite-Nature to use Eruption :<)? Flash Fire Sun Boosted Heat Wave sounds powerful coming off of base 130 SpA.
@ Latias Set
Funnily enough, I used a similar set as that one, but with Draco Meteor and Lefties (In hindsight, probably wasn't a very good idea), and I can say that Latias is definitely better than Latios, as the extra power isn't too much of a big deal. The extra bulk comes in handy vs Sun/Rain as you have said. Tailwind Latias is a lot like Tailwind Tornadus, trading the +1 Priority with good (special) bulk. It also helps that Latias is fast as fuck, allowing it to get off a Tailwind before dying. Overall, I think Latias is a much better offensive answer to Sun/Rain teams than Latios.
@ Musharna Set
Musharna definitely has a place over Cress in Trick Room teams, and it just fits better on offensive teams thanks to it's solid 107 SpA. Seriously, I think Musharna deserves more love than it's getting. I think a set like:
Musharna @ Leftovers
EVs: 252 SDef / 252 HP / 4 SAtk
- Helping Hand / Trick Room
- Heal Bell / Imprison
Could be used to support more offensive teams, since Telepathy lets it dodge all spread moves from it's allies instead of just EQ like Cress. I have Heal Bell over Moonlight for more support, but Moonlight can be used as well. Trick Room + Imprison is great, as it is a good answer against Trick Room teams. Imprisoning Protect is also great, since Protect is useful and what not. I was thinking of putting Signal Beam for Dark-types, but a Fighting-type partner is probably better, considering Musharna is slow as fuck anyways.
A Gravity-set seems like something it can do better than Cress as well, since Cress will lose it's Ground immunity while Musharna can still avoid friendly EQs.