I'm just running some bg's to try and get that titan crystal from the bg solo track and I match with this guy,first 2 rounds were very normal but for last round he used his Capitan Britain(R3) undupped against my Jean Grey(R4) and pulled a 65 second fight with max health.
Reason I'm asking is because I have 0 idea how good Capitan Britain is on attack or what she can do and feel free to slam me in the comments

but I just wanted to ask for the opinion of more knowledgeable people.