http://underrail.info.tm/build/?HgMDAwkDEAkAAAAAAADCoDowAABPZB0zUEvCoMKgwqAjGTxQYissFCpnwodmIcKEHz0uKMK3csK54qK1AuKjiQPirIwK378Will just update with final results. it is somehow min-max according to what I felt the best.
Lockpicking could be increased for stealth.
It can do most fights without too many difficulties. Nevil quest will be difficult, you may raise hacking to avoid the fight. Another tough fight is the creeper lair, they are a lot and come in waves. For other battles, with minimum reloads and preparation, the build is rather smooth.
For equipment, it is classic, the only thing is that I use Neuroscopic Amplified to reach 50%/80% criticial chance. No need to bother with muffled.
Thanks again for all the advices!