Yeah, I run into basically one of three issues with Regent:
- I have a deck that can do good damage and accrue stars, but getting destroyed without any block
- I have a deck with lots of block and stars, but do barely any damage so it's a race against enemies strengthening themselves.
- Card rewards flip flop between forge and stars, so can't build a consistent deck for Act I boss
I can't tell if I'm just playing him bad or getting bad luck, but he's the one I've struggled with the most.