The scim is a poor weapon on it's own but the set bonus is too good to pass up, adding a good amount damage, health, regen, etc. The proc is really not so great. As a weapon considered alone the harpoon, limbchopper, and hax are all better than the scim, but the stat boosts from the set bonus give the edge to scim (which I think is kinda ugly actually). Hopefully the hate set with hax will get a good set bonus sometime soon. Would love to see a set for the harpoon or even limbchopper but I don't think they're gonna make destiny sets lol.