ONSLAUGHT BUGGED?
I was testing my 7* R5 Onslaught in the Labyrinth, and what used to feel like an unstoppable death machine when I played him as a 6* now has considerably lower damage. The degeneration damage is just small teeny-weeny ticks. I don't know if it's part of his kit, but during his specials the DOT damage is absolutely monstrous, as soon as the special ends, though, it goes back to just puny ticks.