https://www.pcgamer.com/destiny-2s-arcstriders-are-demolishing-everything-and-thats-kind-of-a-problem/

Destiny 2's Arc Week brought some pretty big improvements to the game's pre-Forsaken Arc subclasses, but it may be working a little too well. Bungie said in yesterday's TWAB update that a bug in how damage modifiers are applied means that Arcstriders are hitting (a lot) harder than they're supposed to. 

"We are looking intro Arcstrider supers and their ability to achieve higher-than-intended damage against bosses when mixing certain perks. Until fixed, you may notice bosses in Gambit or other activities being pummeled into the ground by Hunters and their Arc Staffs," Bungie wrote. "We’ll keep you updated on the status of our investigation."