Couple points:
- boxing gloves is a pretty weak weapon and you should equip it in the offhand and switch to it before you end your turn for the 15% dodge bonus. Your primary weapon should be the claw (early game) and a crafted Pneumatic Bladed Infused Ancient Rathound Leather Gloves (late game).
- you are missing cheap shots (50% extra crit damage, 15% chance to incapacitate the target) and critical power (combine with cheap shots you now get 125% extra crit damage)
- highest hacking check is 135 and highest lockpicking check is 130. Jackknife provide +7 lockpicking and huxkey provide +15 to hacking & lockpicking.
- you must max your primary offensive skill every level, no exception.
- stealth, imho, is essential to a brawler/psi monk.
This is my dex (leather combat gloves) brawler build I used to finished a hard game. This is my strongest underrail char: not a glass cannon, attacking 10 times(min)/14 times(max) per turn @74% crit chance (13% base + 16% infused rathound leather armor + 15% focus stim + 30% survival instinct) w/ 225% crit damage bonus . Finally there's what I call beast mode (on every single drug in the game) = 1k+ raw damage per pneumatic strike or 3k+ raw damage per critical pneumatic strike.
Wildan posted a str psi-monk build that could possibly look something like this. You'll have to sacrifice points from crafting to hacking + lockpicking.
Hopefully some of my rambling would be of help.
Got it. I could focus on claws.
Is that ok to have only 3 in strength? I though strength was important for melee attacks too (or maybe it's a myth)

With your build, you can't lock and hack, isn't it? I would like to open easily boxes and lockers.
And if I understand, doing a melee build without stealth and without a great dodge and evasion is not a good idea? I could be killed easily on Deep Cavern with that?
Again, sorry for all of these questions and thanks in advance for your time.