Against yellow bar captain a fusion grenade does roughly 1k damage, roughly 1.5k if you stick them. Now, with the other perks in the column free to use, the one most would go for is the burn damage. Does a WHOPPING.... 22 DoT for about 5 seconds...... so unless youre a warlock who likes to be stuck in the air while you ads, this exotic is completely useless. keeping though, with fingers crossed that itll give a 3rd grenade some day.