If your screen is dead, and you don't know what wattage you are running in there, I don't possibly see how anyone could answer that question in any kind of rational way. My magic 8 ball says: "Replace your
mod!"
There's something going on electrically (intermittently, but apparently worsening) so I wouldn't vape it! You have no idea what it's doing, but it's clearly headed for
mod Death, whether it fixes itself again for a brief period or not! Sometimes (it's rare, with a regulated mod, but it can happen) Mod Death results in an unhappy explosion.
Do replace your setup, and dispose of that one.
Anna