why would any one want to use an obsession on a firelock, yes its does offer a bit more resist but best in slot is mang song with diabolos. however presume they dont change much or on es next patch/ptr, eth archon obsession is actually best in slot for max purge es lock. its actually kind off powerful I tested my self on ptr.
ur comparing a 3$ weapon to a 20$+ weapon. plus the extra money for a 20fcr warlock ammy to hit 125
and both clear p8 in one apoc, i doubt most ppl will be forking out extra for a mang song lol
in pvp the tankiness of obsession is nice, I still 1 hit pk most people if they silly enough to run into an apocalypse , rarely ever need to pullout mangsong , -20% isn’t gonna breakthrough someone thats got hotspurs on