Decide on rules before dueling someone?
This...and you have to realize being able to leave combat is part of the stealth class toolkit. If you told me (Deception Assassin) I can't use my vanish, I'd have to say you can't use rail shot or force scream or whatever is important to your class.
It refreshes my damage reduction/force regen and finishes the cooldown on blackout and allows me to use spike. I use and abuse force cloak every chance I get.