I mostly played my 'Lock, so here's some advice for using them: 1) Master your use of Glide. At first, Glide will feel awkward, slow, and useless, but it is (in my opinion as well as most of the other people I've talked to) the best and most versatile movement ability of any class. The first thing you need to know is that it's based primarily on momentum with very little midair control until the first upgrade. You might think activating it at the apex of your jump would give you the best height, but this isn't the case; since it's momentum-based, you'll need to activate it immediately after jumping for maximum height. If you activate it standing still, expect to be unable to move forward very much at all. However, activating it while running will propel you forward at that same speed (and you don't need to hold the button down). Pressing the button a third time, shooting or using ADS will cancel immediately. Use this to your advantage when getting shot at in the air. 2) Vortexes (from your grenade and the Novabomb upgrade) are great for both damage and area-denial. The grenade will kill within about a second and a half of constant exposure (with the added benefit of people still thinking they can run through the middle and come out the other side alive) and the Novabomb upgrade does the same initial damage in addition to the lingering high-damage vortex. Use both of these in tight areas like doorways and tunnels for maximum effect or, in the case of PvE, whenever there's a swarm of tough enemies or a boss. 3) If you have the opportunity, always take the time to Glide before using your Novabomb. This will give you time to line it up plus higher ground to account for its trajectory. And on the note of trajectory, un-upgraded Novabombs have a very short arc. Try to position yourself directly above your target whenever possible. This gives them less time to react as well as giving you greater accuracy.