First Glaceon and Mega Ampharos go out, Vaporeon in reserve. 
Glaceon uses hail, gains 20% evasion 
Ampharos uses light screen 
take hits 
next turn 
Glaceon uses double team 
Ampharos attacks 
next turn 
Glaceon uses double team 
Ampharos attacks 
(at this point glaceon as too much evasion to be hit so they will be hitting ampharos 
Ampharos will do as much damage before dying.  
Before ampharos dies of until I get 3 stacks of evasion, I baton pass into vaporeon from glaceon. 
Vaporeon gains intense evasion 
Ampharos dies at some point so it's vaporeon and glaceon on the field. 
It's hailing and glaceon has evasion 
With stacks of evasion on glaceon, glaceon uses aqua ring to heal every turn + left overs/big root 
With the stacks of evasion and with a little bit of light screen remaining before amph dies, it does nothing but acid armor depending on who we are fighting 
Sweep with a max armor, max regen, max evasion vaporeon and a glaceon with snow cloak, double team and a move that always crits