I've been doing the experiment to see if I can live without stamina on my Fire/Rad Corrupter. I took hasten and AM and I thought I'd see if that would be enough.
Just about to hit lvl 28 and I've pretty much come to the conclusion that I need stamina. As it is right now whenever I start blasting I burn through the end at a rate of knots even if AM is up. Soloing an orange LT will mean I have to rest afterward and I have more downtime than almost everyone I team with.
I don't feel I'm drastically gimped without stamina, I solo at an acceptable rate and pull my weight in teams, but its clear I would be a lot more efficient with stamina.
Respec Trial here I come