In order to improve, you need to understand the strengths and weaknesses of your class. Warlocks are purely offensive, but are somewhat fragile in terms of armor. their primary objective is to do damage quickly and retreat, where their superior regeneration will allow them to be ready to attack again while their opponent is still injured. Hand cannon/ fusion rifle combo goes great with the warlock ' playstyle. You want to keep distance between you and the other player to minimize the amount of damage you are taking, fusion rifles and hand cannot are medium to long range weapons, and scoring head shots in crucible with hand cannons will wreck opposing players. The first thing you need to work on is precision damage. This is best achieved but fighting fallen and hive. Fallen help you with farther off head shots and thralls help with those pressure head shots where the enemy is closing ground. As far as techniques are concerned, try making your first shot without aiming down the sight. That way, when you aim down the sight on your next shot, you have less adjusting to do. Also, the warlock has the farthest reach as far as standard melee is concerned. So when the opponent inevitably gets too close, you should have damaged him enough to kill him with your melee. Finally, spam your super. Sunsinger grenades and melee are one hit kills when the super is activated (if I am not mistaken) and nova bomb is an instant kill. If you content lyrics look for three and four people to kill with one super, you will usually find that they will prioritize you as a target and end up taking you down before you can launch it. Instead of waiting for the perfect time for the whole match, only wait for about a minute, then destroy the next poor suckered you see. This is good for about 1-4 extra kills during a match, depending on your luck and your intellect. I hope this helps.