Need a little help with PvE please.
If you want to stick to GS, which is currently bugged unfortunately but dev said will get fixed, go Domination 20 Duelling 20 Illusion 20, select mental torment, greatsword training, deceptive evasion, precise wrack and illusionary elasticity. Equip power precision crit damage or mix of knight’s/valkyrie gear if you want more survivability. Summon phantasm from range, run in and cast mirror blade at about 600 distance where it can bounce to you. Then dodge and mind wrack. Enjoy your big single target and decent aoe damage. If you don’t like shattering, select compounding illusions, crippling dissipation, debilitating dissipation(chaos line) and keep a fair range from mobs except when you use mirror blade. Have staff on swap for defensive/support situations and your warlock will do good damage in boss fights, though by this setup your gs will still do more damage in the time it takes for those warlocks to attack. Remember to stay in mid range whichever weapon you use so you can get those bounces going, they will allow you to kill mobs significantly faster. And don’t cast phantasms when you know those mobs are going to run behind a tree or a rock or are on top of some stairs or behind a slight bump in the terrain even if you can see them.