I wanted a more offensive Aegislash but WP required it to get hit by a super-effective attack first, so I instead went with Life Orb to get that boost without any prior damage necessary. Mamoswine's takes care of Lando-T, MegaMence, and Heatran pretty nicely, especially with Ice Shard to clean up KOs. With AV, Mamoswin can survive Modest max Sp Atk Z Eruption Heatran and Modest max Sp Atk MegaZard Y Overheat. I wanted some terrain and a fast attacker that could cover for Water types, so I went with Electrium Z Tapu Koko, which nukes everything that doesn't resist. It has Taunt for Trick Room. Gyarados is a nice Intimidate user, and making it Mega gives it a more desirable damage output, a Ghost resist, and a check against opposing Aegislash. Shaymin-Sky cleans up all of the Pokemon Koko can't. Blaziken was the last Pokemon added because I wanted Fighting coverage, needed quick Grass coverage, and wanted a Grass-Fire-Water core. Very hyper offensive team. This team has won a DOU tournament. Don't know if that means much.