"Perfect" post-game/in-game team!?

[Hero]

252 Attack, 252 Speed, 4 HP, Adamant/Jolly Nature @ charizardite

Move spread:

EQ
Dragon Claw
Dragon Dance
Flame Blitz/Flame Charge (Just to avoid recoil damage)

I usually set up 1 or 2 Dragon Dances at the start of the fights and proceed to OHKO using either D-claw or Eq on the first E4 member.
Repeat the Process for the second leader.
Then use D-Dance and any physical fire attack on the 3rd leader.
Use D-claw on the 4th leader.

Use everything you have left on Steven.