Thank you very much guys. I'll be using your first build Niko, instead of crafting I've gone with Hacking and Lock picking since I'm using Oddity exp for my first play through. Wish me luck!
Hopefully you read this before it's going too late.
Remove premed(not worth for TM only), Ambush(doesn't work with shotgun and Electroshock pistol), and Strafe (Shotgun has no move penalty, and it's bad practice for sniper)
Instead, swap them with Fragmented Chaos (the only way to increase crit bonus above 100% for crit power), Snipe (one-shot wonder for first turn, can be abused with stun grenade / flashbang), and Sharpshooter (even more damage for sniper rifle).
This means, you could - 2 AGI, and put it on either +2 DEX (could swap pack rathound with Grenadier / Quick Tinkering, both are extremely strong feat, I would recommend to use infinite weight + speedhack to make the game MUCH better, trust me on that) or +2 INT for much better crafting allocation. Don't skip on crafting, you'll REALLY need it. Many weapon desperately required self-crafted weapon simply because some "extension / mods" never dropped from random enemies, and available frames are often much better than unique guns.