Some thoughts on Dark Phoenix:
I believe that should the situation to let her come out occur she’s the best character in the game.
I feel this is only the case when she has X-factor level 3 and she should always have X-factor 3. X-factor covers her biggest weakness which is chip damage, if you touch Phoenix with a hit in or out of X-factor if you don’t screw up she dies, however there are a lot of 100% chip set ups on Dark Phoenix that if you have a character to DHC into or X-factor un-popped kind of destroys her.
The concept of waiting her out for the match doesn’t work if they know how to play Phoenix, if you feel you can run away from Magneto for 60 seconds feel free to try it with Phoenix, if not then develop a better strategy which I would reccomend.
There are a few primary plans I utilize with when dealing with Phoenix and they are as follows:
Obviously first priority is preventing the problem, this either happens if you kill 2 characters without blocking or getting hit, or if you snap Phoenix in which is much more stable.
It’s vital to stop her from starting to run on the way in, you get 1 chance at a string of mix ups if you hit it you get rid of her, if not you’ve wasted 1 gauge and she’s gained some from the blocking.
If the bad situation occurs and they get 5 meters killing off the 2 team mates for her ASAP is very important, getting rid of her potential health wall to supplement time outs in X-factor v X-factor.
If you have more than 2 gauges you still want to snap in Phoenix, if she’s forced to eat a mix up and turn into Dark Phoenix on success when she transforms she has the option to stay and fight (Lesser X-factor, less scary) or tag out (Forced to eat a mix up coming in, less scary)
Never use X-factor unless it’s to kill Dark Phoenix/Phoenix, being able to negate chip is integral to the worst case scenario game plan, if you’ve blown X-factor Dark Phoenix with X-factor can safely do lots of chip so it’s not worth it to blow.
If it gets to the bad case scenario of they will have Dark Phoenix with no team mates make it happen as soon as possible, regular Phoenix taking out your characters means the Dark Phoenix fight will be harder. Your goals during this time are killing Phoenix, building gauge, and not losing characters. All of these are dramatically more important than timing out regular Phoenix if the player is good.
Once she activates you either need to be ready to safely pressure her right away (Hard, but better) Or get into a corner and be ready to burn 20 seconds. The best ways to do so are things that she’s forced to waste time blocking, if you can DHC into Dante million dollars that wastes a ton of her X-factor time, during that time she’s not chipping you or mixing you up. Figure out at the ratio at which your enemy Dark Phoenix can do damage how much meter you’re required to use and how much you can save, the more you can save the easier it is to kill Dark Phoenix. If you survive until her X-factor is over all you need to do is make her start blocking. If that’s successful you keep the block string going as long as you safely can so her health goes down on its own then Super to kill her on block.
These were just some things I found are important against Phoenix, but everyone has their own strategy to dealing with her.