u/IridescentLuminosity

So I’ve been going through nightfall with my Hero team and have had no issues so far, my team is fully decked out and has good insignias and stuff.
But as soon as I get into these dumb worms I die and die and die and my heroes die even more until they have a death penalty of 60%!
Google says junundus shouldn’t get death penalties…is this a bug?
I can’t continue on like this, I literally can’t reach the next quest goal!