Versatile Elemental Crossbow Trapper -
https://underrail.info/build/?HgMHBwMQAwcAX8KgAAAAwqBMRUBLaGw2IloALQBGAABMfzkiMAImwqPCgCtLTGonwocWwrXCpMKFwp7CnMKtGuKijAPio7AC4qe-Ct-_Wherever you can Ambush (even in Arena- you can move couple of tiles back to the wall) or Bear Trap, you will 1 tap most targets. Bosses can be shredded in a turn with bosted AP or CCed. And long range will be such a pleasant change. And versatility is there for robots/high mech resistance targets, as Energy Pistols will benefit from same feats (Crit, Crit Damage) and Versatile won't need Specialization points as those target's are non-evasive. For Nagas - EMP Grenade/Mine MKIII + Flare/Molotov + Acid Bolts. You will have such a high detection and stealth with a custom armor / Rathound Regalia, that you can quietily hunt and assasinate Death Stalkers on Dominating (it's an orgasmic feeling).
Thought Control - Temporal Manipulation Trapper -
https://underrail.info/build/?HgMHBgMDEAgAWgAAAADCjEBGPzxLZTA3XsKgAADCoCAARDkoKz8wKgVkIyEWwockwr1mJ8K3wrvCneKitQLio7AC4qaGCuKsjAHfvwDoing a Dominating run with this one. Unbelievable fun. Will post and link a vid to this post with me doing Arena at lvl14 on Dom (right after Depot A), and Carnifex begging to spare his life (Love you Styg for including such chatter from enemies XD) while his mind is being melted and is chased by his Doppleganger. Can do all content. Can kills snakes while they are submerged, can CC whole crowds. Has traps for even more CC and to eliminate low PER weakness of not being able to detect them. Included Pickpocket for more money on Dom, move points whenever otherwise.
For robots - EMP nades/traps, Bear Traps, Stasis as Temporal Distortion needs 2 turns. If you know in advance that you will verse robots, you can pop on a TM Circlet with boosted TD damage to wipe even Nagas easily. Grenadier included for AOE damage and EMP MKIII + Stasis + EMP MKIII = 6 turns of free damage on robots.
Chem Fist -
https://underrail.info/build/?HgMQBwcDAwcjLwDCoCgAwqBLKzIAUmplK2YALQB0AABLTzkrwqMgEwZOB0sWwpFWwocvwrMxEsKewqDCn8Kcw4zCreKdjQrin4QB4rWuBN-_Will be my next playthrough on Dominating. Fists with Pneumatic Hammer are some of the most fun tools out there - every 4th hit just target a full HP enemy and you either 1 tap or CC them. This build has it all - unreal damage vs soft targets and versatily for Chem Pistols on all Hard, Non-evasive enemies and Cooked Shot for evasive (like Carnifex). Once target is rooted and you can shoot and hide from them - they are done. Higher quality Acid pistols have 60%+ chance to root and that negates all evasion, so they are screwed. With Kinetic Imprint you have even more tools. Almost nothing resists acid, and what does, won't resist fire or being Ice Cubed and then punched to death.