For Rotom-W, Volt Switch and Hydro Pump are nobrainers. He can be built to be a bulky attacker with Leftovers. Third slot is will generally be Will-o-Wisp or T-Wave to cripple a threat. Final move can be Pain Split for more recovery, or Hidden Power ice for coverage. If you decide to run a choice variant, you should. replace WoW or TWave with Trick. Pain split recovery should be kept.
I have a Gothitelle too, but I set it up in a strange way because of the way it fits in my team. The cookie cutter build is a Timid or Modest choice specs build with Psychic/Psyshock, T-bolt, HP Ice or Fire for coverage, and Trick. Gothitelle is only made worthwhile with its dream ability Shadow Tag so make sure you have that, otherwise it's worthless. The plan's simple - switch in on a threat, trap and destroy it. Psychic is preferred, but if Psyshock is useful for dealing with specially defensive Pokemon like Blissey. Though for walls like Blissey, a simple Trick will cripple it. Thunderbolt is just good coverage, and you should patch up any holes with the appropriate hidden power (a real hassle to breed).
Blissey is a pretty nobrainer support Pokemon. Seismic toss is its only reliable damage dealer. Toxic to break other walls/stallers, or T-Wave to stop aggressive threats. Softboiled for recovery. If you have no stealth rocks user, Blissey can fill that role. Otherwise, use Aromatherapy.
Wish is very strong now in Gen 5 and is very viable (thanks to Blissey's massive HP pool). You should run it alongside Protect, keeping Seismic toss and Toxic.
