Plant a turret, watch it shoot things. Pistolero deploys a cactus turret that fires continuously at nearby enemies with no further input required, on a 40 second cooldown, which is quietly one of the better passive damage sources in the game.
Strategy
Place turrets to cover your flanks or protect an objective you're defending. Casting Strikes on a turret position triggers the Cactus combo, releasing lightning from the turret in all directions. Recast as soon as the cooldown allows to keep a turret up as often as possible.
Strengths
Passive damage coverage while the turret stands
Frees you to focus on other threats while turrets handle their lane
Reliable combo trigger for Strikes + Cactus interaction
Weaknesses
Turrets have fixed placement and can't reposition
Limited effectiveness against fast-moving enemies that kite around them