Arcstrider is indeed really, really good in pve due to its versatility. It add clears like a boss, everyone knows that part. It's probably the best add clear super in the game. But people woefully underestimate its boss damage, because most people use it wrong on bosses (learn your combos, people!) It easily out damages Blade Barrage on bosses when it comes to overall damage (obviously not in spike damage). This was true even before the nerf to Blade Barrage. Now, I haven't tested this recently so I don't know where things currently stand after various updates....but last time I checked, top tree Arcstrider with Raiden Flux was second only to post-buff Chaos Reach with Geomags when it comes to overall boss damage (not dps, I'm talking total damage done per super). It obviously takes a lot of time to achieve this damage though, it's not a spike. The grenades suck tho.