I main Hunter but I've been playing as a Sunsinger Warlock lately and I must say, warlock is a fun class due to its abilities always give an advantage (viking funeral + fire bolt grenade and scorch melee, self res) but I would say Warlocks are only useful in elimination/trials. Hunters are the all around good class that can do basically anything, + we have speed & Cayde. + Golden gun > all.