Opponents cannot be defeated.
Magneto (15,509) on Elder’s War, Book 1, Act 5 heals too quickly despite flawless play. Along with Absorbing Man (Boss) on Overture of Evil, Chapter 3, Encore.
Against Magneto I battled with Captain America (4,987) for substantial amount of time, dealing 939 success hits, only 155 hits received. I gave up because I couldn’t get his health below 96%. This is crazy considering my team’s total rating was above the suggested rating for the quest.
I have a video of my play with Captain America against Magneto which I can share.
Additionally, there are glitches with the Elder’s War maps where portions of previously conquered routes appear to be unexplored, including the route with Magneto. The last run of this particular route is shown explored while the rest is unexplored. More significant examples of this have been seen on prior Acts (see image in comment below).