If you're going to spec into traps and electronics, Plasma mines are extremely strong, especially if you can reliably detonate them with throwing invested.
I don't really understand why you wouldn't take aimed shot & snipe though, especially for a steath & critical focused build. I understand how deadly snares works.. but are you really using beartraps for every fight? If it's for the personal challenge, then all power to ya.
Snipe, aimed shot and cryostasis shattering let you breeze through early, middle and any time you ever run into a group of three or less enemies later on as quickly as you can encounter them with no prep.
I used to play build like this with aimed shot and snipe, but i found that these feats are nearly useless in late game, because of ambush and deadly snares. For ambush you just need a single flare or molotov, there are so many of them ingame. Also you can't use elemental bolts with snipe and aimed shot, for me it was another reason to drop them. In lategame you will be able to kill 4-5 enemies in first turn if you ambush them. Traps will be useful mostly for the most difficult fights (like beast or rednecks camps in expdeiton), or in places where Ambush can't be used. Plasma mines and grenades are cool, and it's better to join coretech faction because of that (they usually sell plasma grenade blueprint, unlike JKK)
About cryostasis - I never used that strategy, also I never used statis from temporal manipulation. They can be very useful, I just used TM only for a speed buff.
So I dropped aimed shot with snipe because you can score criticals every turn by other ways (mostly ambush, but also snares for a backup option)