You said warlock are pve gods in what way? Do they do massive amounts of damage like a titan when he or she throws down there bubble? Because the warlock can only self res and chuck solar grenades for a certain amount of time. Also warlocks need a guaranteed kill to generate orbs unless you die and can generate 2 same as the titan when you trow up the bubble but if you have the perk were you just let the enemy shoot the bubble you can generate 5 orbs in total with out killing an enemy. Just doing that you can keep a super chain going. In a way titan are best fit for pve. That just my opinion