Not worth the exotic slot in PVE...through no fault of its own. Legendary Heavy weapons remain woefully underpowered relative to their exotic counterparts. There is a MASSIVE step down in damage output from Wardcliffe Coil....to Bad Omen. Even if its a "pinnacle" version of that weapon with tracking, Cluster bombs, and a "Boss damage" mod. So Arbalest suffers from the same problem that every other primary or special weapon exotic suffers from in D2: Is this weapon worth NERFING my damage output by forcing me to have to take off an exotic heavy weapon...and go with a legendary counterpart? That answer is almost always "No". ...and the sad fact is that the recent nerf to LMGs has made the situation worse. Because well-rolled legendary LMGs were close enough to Thunderlord in performance, that it was occasionally worth putting down Thunderlord to use one. But now? The only non-heavy Weapon exotic that sees any use in my game is Riskrunner....and only when I need the arc damage-resistance.