Thanks for the response. So chem pistols are the way to go then? what sort of stat spread should i be focusing on? will this do?
3 str
10 dex
7 agility
3 const
10 per
3 will
4 intel
And would i choose all the same talents as a regular firearm pistol build? or do i need to specialise into psionics also?
I think if you are feeling squishy on an smg build, you will feel even squishier with 3 con on a chemical pistol build. On normal difficulty you don't need to min-max like that, and can go with a less "optimal" stat spread with higher constitution, just to get a few hps more.
I'd actually consider going with energy weapons and high intelligence (instead of dexterity). Base cost of a laser pistol shot is 15 ap now, so that is 3 shots per turn. But you can get more with temporal psi & adrenaline. Psycho-temporal contraction is a psi ability that provides an additional 15 ap for 2 turns, or if you take the psycho-temporal acceleration feat this increases to 20 ap for 3 turns. And this buff stacks with adrenaline, for a total of 90 ap for 3 turns. That is 6 shots with a laser pistol or 3 shots with an electroshock. At the same time, if you go for high intelligence and take the high technicalities feat asap, your base damage of energy weapons will be higher, and so will be your damage output. And if you take the psi pill for temporal, you might as well invest 35 points in methathermics and 45 in psychokinesis to get more crowd control (cryostasis, force field, electrokinesis, electrokinetic imprint).
For example:
str 3, dex 6 (for the grenadier feat), agi 3 (you can sneak even with 3 agi, because stealth is easy to raise with items), con 6 (for the fast metabolism feat), per 10, will 3, int 9
Use your level up stat points to raise per to 12 and and int to 13.
This is by no means an optimal build. But I think going that way (instead of the classic high dex, 3 con build) might be easier if you feel the issue is that your character is too squishy. Psi provides crowd control, while high intelligence will make all crafting easy to raise (so you can craft yourself both mkv frag grenades and mkiii plasma). The ridiculous damage output on critical hits with plasma pistol will make one-shotting certain tough enemies easy. And if you invest in mercantile - you will likely become the richest person in Underrail.