Cloudkill and crits
Im pretty sure that cloudkill can not crit right now, at least against monsters. Right now i did 15 fights against Tier 8+ monsters only using cloudkill to damage them and with 27 crit stat i never landed a critical hit.
It is a bug or it is designed like that?
Unless this was intentionally removed, I am fairly sure this is a bug. If I remember correctly, it could crit in the alpha build.