1.1 Power gain Path has some tough match-ups. I found Doc Oc to be my MVP for most of the fights in this path. Havok was the only pain, and I really don't know of a good matchup for him besides Vulture, Venom or Angel all of which I don't have as a 5*
Here's a video of me taking that path:
https://youtube.com/watch?v=PuLxlMIBfW0&t=12s