Angela +Odin + Galan pre-fights - Second Chance, a healing hack [I prefer healing when opponent is heal blocked on second medium, but she also does great with toxic siphon - you just lose the heal block utility which can come in handy]. After Galan defeats an opponent in the first room, use prefight on Angela, swap for Heimdell. Make ssure you have a relic equipped. Then you can just parry, mlllm, mlllm, special, repeat for almost every fight. Suicides are great because you heal when indestructible. Heimdell gives you two opportunities if you die. If they are stun immune, hold block for their heavy, then punish it.
Lots more strategies are out there [that might even be better if you're not carying], but this one is so OP that I only read the nodes on the first room to make sure the nodes are from the same pool and nothing new was added. Even went to zone 110 without reading a single node except when I died at the very end. I did die on purpose two times to verify that I wasn't cheating if KABAM every wonders, but even that was difficult to actually die when I wanted to just standing there. Have done 4 carries for alliance mates [ not all rooms are linked degen, which makes it even easier, specifically 11-15]. The opponent is far more important than the nodes imo, so plan against the opponent first.
And be nice. There are a ton of jerks out there. An shout out to
@Goodlordbird . I'll even give you a carry. Send me a message on Discord or Line if you have them; if not, send message forum.

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https://www.youtube.com/watch?v=bIMQW2kGlq8&lc=UgxXYEswP5CpeiFkZQV4AaABAg