I start to lose my patience when I organize mid-tier characters ^_^
It shows.
I put him that high for inescapable chip hell and Dorm/Doom and teleport traps. Wesker is good at getting hits, but he needs resets out the wazoo. I also included Dorm on the minimizing hits section because of the xx stalking flare, purification x infinity assist killer DHC. I really do think Dorm is at least tied with Storm for best assist killer DHC, assuming your point character can set it up(like magneto).
Wesker has a command grab, though. That alone makes him much, much better at opening people up than Dormammu. Very few characters can do the anti-assist setup you're mentioning for Dormammu.
Awesome ground bounce assist and one of the best THC hypers out there, plus high health!
Nova has an awesome ground bounce assist. Nemesis has a mediocre one. His rocket launcher hyper...who is it really good for?
His install hyper is awesome, but C.Viper's soft knockdowns are too. You really think he has better assists? I always thought Thunder Knuckle was one of the most underrated assists in the game, and she's got a standard OTG and an overhead.
Hadangeki assist is really good when doubled up. I'm not clear on why Thunder Knuckle is better than Ryuenjin. The install hyper is also there for self DHCs, something C. Viper doesn't have.
Mighty Smash is the best crossover counter in the game, and is a fantastic assist. Mighty Spark is a decent beam assist. I think he's a good team player. Mighty Smash even causes a hard knockdown. It leaves your opponent vulnerable so long that if you do OTG Flame Carpet + Mighty Smash, Dormammu actually has time to charge 3 Dark Spells and unleash 3D0C. To my knowledge, no other assist lets him do that. It would be interesting to try and run Thor/Strange and see what kind of utility comes from 3 Graces of Hoggoth being set up from Mighty Smash mid combo (you could blow all 3 Ms up for big damage, or set up 3 Ls for a laser).
I think something like Thor/Strange, and then Arthur or Iron Man, would make for a good team.