Vex Multi-Tool. It would shoot the singular fusion rifle bolts at a slower RoF (same as MIDA) with the ACOG+delta reticle. [spoiler]Jizz[/spoiler] Edit 1: Fusing exotics would actually be a good idea, but if you did, you would give up the possibility of ever getting those two exotics ever again. Like it would take both exotics off your loot table. Forever. Edit 2: Another good idea, giving kinetic exotics burn damages. Through quests or rewards. Like a Burn Bounty.