[RMT] [BSS] M-Kangaskhan, Togekiss, Klefki, Blaziken, Greninja, Rotom-W

The Pokemon:

Kangaskhan @ Kangaskhanite
Ability: Scrappy
EVs: 252 HP / 252 Atk / 4 Def
Adamant Nature

• Fake Out
• Double-Edge
• Low Kick
• Sucker Punch

Mega-Kangaskhan is great. Fake out + Sucker Punch let her play the priority game. Low kick OHKO's opposing Mega-Kangaskhans without HP/Def investment (You still have a 12.5% chance to OHKO 252HP/4Def without needing a critical hit). Low Kick also OHKOs things like Tyranitar. Sucker Punch gives an answer to offensive Ghosts, such as Sash Gengars running Focus Blast. For everything else, there's Double-edge.

Greninja @ Life Orb
Ability: Protean
EVs: 4 HP / 252 SpA / 252 Spe

• Ice Beam
• Surf
• Extrasensory
• Dark Pulse

Greninja is just the simple combination of great speed and type coverage. Extrasensory helps fend off Fighting and Poison types that could otherwise give this team troubles.

Togekiss @ Choice Scarf
Ability: Serene Grace
EVs: 84 HP / 252 SpA / 172 Spe
Timid Nature

• Air Slash
• Trick
• Roost
• Tailwind

172 Speed EVs lets Togekiss outspeed positive natured Base 130 speed Pokemon. Togekiss runs on the pretty simple concept of spam Air Slash, and also the backup plan of using Trick to neuter set-up Pokemon. Tailwind lets him gain his speed back after a Trick.

Klefki @ Leftovers
Ability: Prankster
EVs: 252 HP / 68 Def / 188 SpD
Bold Nature

• Toxic
• Protect
• Substitute
• Draining Kiss

I'm currently breeding for Klefki right now. In the meantime, I'm using Aegislash, and not completely sure which is better for the role. Klefki has the advantage of a relevant ability, where Aegislash has better base stats and typing (Ghost lets Aegislash get a free switch in against Fighting type moves that target Kangaskhan).

The idea with this set, is it requires one turn of setup to Toxic the opposing Pokemon, then you can loop Substitute and Protect while gaining life back with Leftovers. I think Klefki is better than Aegislash because of this, since Klefki only needs one turn of set-up (Toxic) where Aegislash needs two turns (Toxic + Substitute). Draining Kiss lets Klefki gain back some life if they don't immediately break the substitute, and can also lower the amount of turns you need to stall out.

The EV spread gives Klefki near-equal Defense and Special Defense. This set is pretty much shutdown by Poison and steel types, as well as magic bounce and Taunt/Encore. I considered Magic Coat to deal with Taunt, but Priority Substitute already covers Will-o-Wisps, Thunder waves, etc, so I think I like Draining Kiss better, and will just accept the Taunt weakness. It is still somewhat of a consideration, though.

Blaziken @ Lum Berry
Ability: Speed Boost
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature

• Protect
• Flare Blitz
• High Jump Kick
• Stone Edge

Blaziken gives a lot of type coverage missing on the team. Life orb is more important to Greninja, but Lum Berry helps Blaziken switch into Spores and Tunder waves, and his typing helps him switch into Will-o-Wisp.

Rotom-Wash @ Choice Specs
Ability: Levitate
EVs: 76 HP / 32 Def / 148 SpA / 252 Spe
Modest Nature
IVs: 6 Atk / 28 Def

• Volt Switch
• Hydro Pump
• Hidden Power [Ice]
• Trick

252 speed EVs lets Rotom outspeed Neutral 252EV Cresselia, Suicune, Gyrados, and Azumarill, as well as the unboosted base 80 speed Pokemon. It also outspeeds positive nature base 70s (Jolly Breloom). The HP and Def investment makes Talonflame's Brave bird a 3HKO.

The cores:

Klefki
Kangaskhan
Togekiss

Klefki leads and spreads Toxic. Kangaskhan's Fake out and Togekiss's Air Slash flinch the afflicted Pokemon to further the stall. Togekiss can Switch into Kangaskhan's Fighting weakness and Klefki's Ground Weakness. Klefki can switch into Togekiss's Poison Weakness. This core worked a little better with Aegislash since there were two Pokemon able to switch into Fighting moves for Kangaskhan, but even without the immunity 4x resistance is good.

Blaziken
Greninja

These two cover each other very well. Greninja can switch into Psychic attacks for free, and their coverage options help take out each others weakness pretty well. Add Kangaskhan or Togekiss for a hyper offensive team

Rotom
Togekiss

Against stall, double Trick is ferocious. Both also spout ground immunities, so this core can pair well with Blaziken, or if I want to go my own stall route, Klefki.

My main questions right now are:
Klefki or Aegislash?
Are all the EVs correct? Particularly with Klefki.
Is there another Pokemon that does one of the roles on the team better?