For the E4 in general, it’s pretty bad. I’d get everything to the same level, as E4 scales to your highest level mon. Garchomp should have Outrage or Dragon Claw over Dragon Rush, and Fire Blast or Stone Edge is preferable over Flamethrower, though IG the accuracy could be useful. Remove the defense EVs and put 252 in Spe and 4 in SpA. It’s a fast sweeper, so Max Speed is useful. Life Orb is fine here.
D. Scizor is bad without Scarf or Banded Ice Shard. Here’s a Scarf set.
D. Scizor @ Choice Scarf
Ability: Tough Claws
EVs: 252 Atk, 4 Def, 252 Spe
Naive Nature(Jolly is better, but it doesn’t matter that much)
- Close Combat
- Ice Punch/Icicle Crash(Ice Punch has 2.5 more BP cuz Tough Claws and 100% acc, but Icicle Crash has flinch chance)
- Knock Off
- X-Scissor/U-Turn(for Shadow Mewtwo, Bug Bite is also an option if you don’t want to grind for the TM from Sonata Tracks.)
Delta Typhlo is not worth it. I’ll consider some picks later.
Blaziken should have those HP EVs in SpDef for maximum efficiency, but it doesn’t make that much difference. High Jump Kick over Sky Uppercut for the BP, though you could run EQ for similar coverage. You could run Flare Blitz, but beware the recoil.
D. Luxray is again, not great for E4, with that 4x Ground weakness.
Delta Roserade is generally a New Moon sweeper with Shadow Dance, and it’s not great vs. E4. So, we’ll replace those 3.
You now have M. Blaziken, Scarf D. Scizor, and LO Garchomp. A second Ground type won’t hurt, as Ground, Fighting, and Steel are very good vs the E4 and Champ. Instead of Sand Rush Excadrill, I think Mold Breaker Scarf Excadrill is better here. You would have a hard time fitting in Armored Tyranitar with your core squad, so Mold Breaker is better for the E4 in general, though you could try to reverse sweep Eduard with Sand Rush Excadrill. You can get the HA from Friend Safaris, it’s a 1/5 chance.
Mold Breaker
Excadrill @ Choice Scarf
Ability: Mold Breaker
EVs: 252 Atk, 4 Def, 252 Spe
Jolly Nature(as long as it isn’t -ATK or -SPE it should be fine)
- Earthquake
- Iron Head
- Rock Slide
- X Scissor/Toxic/Brick Break
Sand Rush
Excadrill @ Life Orb/Leftovers/Soft Sand
Ability: Sand Rush
EVs: 252 Atk, 4 Def, 252 Spe
Jolly Nature(as long as it isn’t -ATK or -SPE it should be fine)
- Earthquake
- Iron Head(Replace for X Scissor when fighting Reukra if possible, you could also use it for Eduard)
- Rock Slide
- Swords Dance
Now with Excadrill+M. Blaziken+Scarf D. Scizor+Garchomp, the squad seems very physically oriented. You don’t have a Taunt user, so let’s run a Gengar. You could run Gyarados, but I think Gengar works nicely with the Fighting+Ground spam you have so far. Both shut down Kayla and Eduard’s leads with Taunt.
Gengar @ Life Orb/Black Sludge
Ability: Levitate
EVs: 252 SpA, 4 SpDef, 252 Spe
Timid Nature
- Taunt
- Shadow Ball
- Sludge Wave/Bomb
- Focus Blast/Thunderbolt/Dazzling Gleam
The last slot is up to personal choice, but I think something that beats London is a good choice. Gengar deals with Kayla, and M. Blaziken+Scarfers deals with Yuki, Eduard, and Reukra. I would use BU D. Snorlax for the Yuki, London, Eduard, and Reukra matchups.
D. Snorlax
Delta Snorlax @ Leftovers
Ability: Thick Fat
EVs: 188 HP / 144 Def / 176 SpD
Careful Nature
- Bulk Up
- Seed Bomb
- EQ/Drain Punch
- Synthesis
You could run Drain Punch and EQ and forego Synthesis altogether, as you’re fine without it, but it helps set up a bit more.