Elite 4 help

I need help with the elite 4. My team is:
Mew lvl 95; no item; thunderbolt, ancient power, Draco jet, grass knot
Giratina lvl 100; rocky helmet; aura sphere, shadow claw, shadow force, hex
Delta Gardevoir lvl 100; no item; zap cannon; ice beam; blizzard; thunder
Delta ambipom lvl 93; spell tag; fake out, destiny bond, drain punch, night shade
Tyranitar lvl 93; armor; focus blast, crunch, earthquake, stone edge
Delta charizard; mega stone; flame charge, dragon rush, lunar cannon, phantom force.