Need some team advice

Currently got
Protean Greninja
timid speed/spec attack
ice beam/u-turn
dark pulse
extrasensory
scald

mega mawile
adamant attack/hp
fire fang
iron head
play rough
suckerpunch

Gardevoir
modest spe attack/speed
calm mind
thunderbolt
moon blast
psychic

Thinking about switching her for alakazam or some other psychic, preferably dual type.

Infiltrator Noivern
timid spe attack/speed
boomburst
draco meteor
hurricane
Not sure what to do for the last move

I was thinking Gengar for a slot, but I'm not sure. Was leaning far more towards Chandelure especially for fire stab.