The Warper has 3 Lancer spikes on the front and 3 Mega Destroyer barrels on the back. Left click shortly makes the lances extend for 5 seconds and has a 10 second cooldown. You might think "those barrels are useless!" But no. When you press shift, they all fire in rapid succession, producing HUGE RECOIL. It can propel yourself across a ranger's view. It has a 20 second cooldown. Reload increases the time for the lances to be extended.
As The Warper
Ramming builds are the best. Find an unsuspecting target and charge at them. You can also use the recoil to boost yourself out of a fight and to run away from boosters. If you want, you can upgrade bullet damage to give boosters a nasty surprise.
Against The Warper
Trappers work well against this. Destroyers and Sprayers too.