Warlocks also get a shield too now that I think about it. Just by hitting people. And Titan's Shoulder Charge isn't as bad as you think. I've countered Shoulder Charge SOOO many times by shotgunning them or beaming them with a Fusion Rifle and hell a sniper rifle makes quick deaths for many Shoulder Charging Titans. I don't normally Shoulder Charge too often though but I guess it's a counter too Titan's VERY short range melee while Warlocks and Hunters have a longer range melee attack.