holy hell is the cosmic version difficult. most of my "tougher" characters who can do cosmic patrols without any worries were getting one-shot, and even on my thing who is built for maximum tanking he couldnt stand still for more than 2 seconds without getting melted.
the only way i was able to beat it was using summoner ultron, constantly re-summoning drones and staying as far away from the doops as possible. i still died a lot, since the hammer attack has a larger hitbox than it shows, but i finally beat it.
ugh, that was not fun at all, just frustrating.