your team is mostly fine but I would
get rid of iron tail on luxray for iron head
get rid of t wave of gardevoir for a coverage move like focus blast or psychic
get rid of hyper beam on t tar for a coverage move or stealth rock
You also might want to replace ampipom entirely, as it’s a terrible mon and the moves you have on it are not great.
I’d recommend delta torterra to cover your ground weakness and be a good tank. If you want I can breed you one
A taunt setup annihilates Kayla. If you can get a mon with prankster and taunt, that’ll really help prevent the E4 from setting up on you