I'm a hunter and I found out on my gunslinger that throwing the tripmine grenade is way more useful than golden gun. Doing about 1-2k if you stick him then an extra 6k when it explodes on time vengeance. Only time golden gun is useful is when you get into timestream and you gotta get rid of the oracle or the Minotaur on venus. I also use ice breaker in between my cooldown for the grenade just for the extra damage.