This is just more flexible variant of energy pistol build. By using Stunner you can drop some crafting feats and still be strong
Full PER variant
https://underrail.info/build/?HgMIAwMQAwrCoF8AAAAAwqA8PAAAETIODTIANwBGAAAsJjEowpoCwoNZKkvCh8KFKSTCtcKkeG0abMOZwp7CrcKdw5zCrsOIKxbip74K4rSUBd--8 dex 10 int and 18 per for 10ap stunner shot
Core feats:
Hight - Technitialies (5), Ambush, Premeditation, Critical Power(10), Psycho - Temporal Acceleration
Other feats and tatoo are optional
Core Skills:
Guns, Throwing (127 effective for CC like EMP and molotovs), Sneak, Hacking - Lockpicing (i Think 60 base is enougth, there are some items with bonuses - check gear section)
Crafting:
Mechanics ~40 effective (mostly for crafting infused rathound leather armor and some grenades\mines)
Electronic ~168 effective
Tailoring (~128 effective) for infused rathound leather armor)
Biology ~ 70 for hypercerebrix crafting
Chemisty ~20 for gas grenades. If you want you can level up more to create more powerful mines and grenaddes, especially Thermobaric Grenades for thumper (need to level up mechanics a little for them too)
Mercantile 44 (need to have 80 effective with Large Waist Pack to get Bespoke Buckle Shoes ASAP after prologue)
Other skills are optional
You can have persuasion (about 30-40 will be enougth with all gear)
You can level traps a little (to use mines). You can level up more Chemistry for better greandes and mines
If you like you can level dodge to 30 and get Escape Artist feat
Pickpocket if you like (especially if you decide to go full dex variant)
There are many skill points
Psi:
TM 70 (Psycho-temporal Contraction and Stasis)
Psychokinesis 55 (Proxy for Ambush, Grounding, Imprint)
Combat gear:
Seeker NV Googles
Soft Padded Infused rathound leather armor with black cloth
Stunner \ Thumper
Launcher Grenade Strap Belt\ Doctor's Pouch
Ninja Tabi Boots \ Infused Pig Leather Striders
Optional gear:
Synesthetic Refocus (Hexagon)
JKK Armor (Lockpicking, Initiative, Persuasion), Different Exoskeleton armors from compound (each will give you different crafting points). Lemurian Engineer Suit, Tesla armor
Jackknife \ Power Fist \ Remote Control Energizer Glove
Trapper belt, Bioinvestigative belt, Large Waist Pack (Mercantile)
Bespoke Shoes (+2 agility, Persuasin and mercantile), biohazard boots, Infused Greater Siphoner Leather Tabi Boots
Conclusion: This build is flexible, this is all per variant and this one is not the optimal one i think, you can take some points from per and get more agility, dexterity or even INT. I am not sure about 17 int \ 11 per variant too, maybe this will give more damage. You can make 18 dex and 3 per version with versality and Survival Insticts, per in other variants should be 10-11 i think.
I will be happy to read your ideas about this build and different variants with atribute points