Originally Posted by Demarcus

I do not play Field Ops/Oppressor roles very often but I will definitely remember this little trick. There is nothing more satisfying than a little parting gift to someone who just killed you, be it a cooked grenade, a just planted mine, or an entire salvo from your artillery!

Retargetting is much more effective with the Plasma Mortar. They both fire 6 rounds of about equal damage, but the plasma mortar has a much lower rate of fire. With rocket artillery, you can usually only kill 2 targets per volley because they fire too quickly, and most of the rockets are wasted on overkill. Once the target you lock onto is destroyed, the remaining rockets will circle in the air. At this point you can send them down anywhere you'd like, but that's the end of the barrage. Because of the slow-firing rate of the mortar, you can often kill 6 separate targets. Another reason why the mortar is much more effective is its high firing arc, which usually allows the mortar rounds to avoid any obstacles. Unless you're careful with the artillery placement and your target is out in the open, rocket artillery will often hit obstacles in the way due to its mostly-direct path. If you're targeting a spot on the ground, they'll fire in a high arc, but when locked on the path is fairly direct. The only advantage rocket artillery has over the mortar is that it can destroy a deployable or vehicle very quickly.

With the mortar, what I like to do is lock onto a deployable or vehicle, destroy it, and retarget the remaining rounds on infantry or other vehicles. It's very easy to kill several enemies in addition to your initial target. For RA I do the same, but can only retarget it once.