Should I put mew in my team?

Just want your opinion on whether mew would work for my team and who to replace for it. I am preparing for the seventh gym right now

D. Charizard @ D.Charizardite
-Iron Tail
-Shadow Ball
-Dragon Pulse

  • Lunar Cannon

D. Gardevoir @ life orb
-thunderbolt
-Ice beam
-Calm Mind
-Nuzzle

D. Muk @ choice band (probably going to replace for D.Metagross (spider) soon)
Earthquake
Submission
Minimize
Custom move electric

D. Crustle (Cake) @leftovers
-Play Rough
-Return
-Aurora Beam
-Shell Smash

D. Snorlax @ leftovers
-Seed Bomb
-Earthquake
-Belly Drum
-Drain Punch

D.Bisharp @ D. Bisharpite
-Hi Jump Kick
-Power up punch
-blaze kick
-aerial ace

Any other tips would be greatly appreciated, thanks in advance!

I don’t think you need mew but you could replace d-crustle with d-roserrade then you could give it psychic
you could also replace D-muk or D-metagross with D-hydragon and give to u-turn or a different Pokemon a bug type move

hope this is still relevant