Vicious Cycle lets you follow a melee hit with a ranged shot that does heavy damage. It is a Tier 1 Ranged skill that mixes melee and guns into one quick finishing move.
It is a fair Tier 1 pick, but Focused Shot is more important. Take it when you need another point in the tier.
Bull Rush and Talk Shit, Get Hit, which set up close-range moments.
Use it on a human who closes in on you. The shot after the hit is often enough to finish them.