All of my nine characters change rotate builds every time I play; sometimes it’s a meta build (usually with some nerf because I will be omitting some key piece of gear or skill; still fun, but I’m not steamrolling), but usually it’s some random
My favorite non-meta build is a Bloodletter with a Leech (pick your favorite non-Deathless relic here… I usually go with a Lunacy, but I won’t say no to a Hot Drop with fire enhancement). The key is to get enough magazine size so the taser has two in the magazine (via your relic and points in the Bottomless Mags tree). Redistribution, Forge, and Experimental Munitions are on point for this.
You want two rounds in the taser magazine so that when you fire one, you aren’t committed to a long reload (the second shot stays in the bank to avoid this or fire in a pinch). Fire the taser at a crit spot, where it will constantly trigger Redistribution (to get that second shot back in the magazine faster). The taser fire also heals you, so while it’s throwing crit damage for its duration (buffed by Experimental Munitions and whatever else you threw at it in the build… I haven’t checked to confirm that Fire in the Skag Den helps here, but some Stoke the Embers helps), your shield gets solid regeneration from Bloodletter being fed by the taser. Switch to another weapon for damage (or switch modes and fire the Leech pistol, though I get that few are fans of its damage output). See also: Force Feedback being constantly triggered by the repeated crits from the taser. For further consideration, unloading numerous tasers simultaneously when exiting Iron Bear.
When your taser(s) run out, and you switch back to it at some point because there are more dings in your shield, you don’t have to reload because the first shot was still in the magazine.
I like this because the mechanism is a hoot, and I’m free to use other gear while the taser tanks me up.