The only mods you need to add to this game are Redux 1.3 + Equilibrium 2.2.
I wouldn't recommend Redux 1.3 on it's own, the author increased the lethality of combat substantially (ie, you die from 1 or 2 non-critical gunshots) with the intent for the player to always strike first and strike from stealth. This makes melee utterly redundant and combat itself an annoying affair.
Equilibrium balances the game (utilizing the fixes from Redux 1.3) beautifully to the point where I'm having an excellent
(and challenging) experience playing on Tough Guy / Hard. Equilibrium says they don't support higher difficulties, but I found the challenge fun so far, unlike Redux's "die on two hits hope you saved" approach.
You can get both of these mods on mod db:
Redux 1.3
https://www.moddb.com/mods/fallout-tactics-redux/downloads/fallout-tactics-redux Equilibrium 2.2
https://www.moddb.com/mods/balancedux/downloads/equilibrium-v20-final Equilibrium overhauls the Perk system, so most perks are actually now useful (unfortunately, Ninja and Drunken Brawler are still bugged, according to them). The new info is provided by them in their archive, but the way it's formatted doesn't lend itself as a useful resource to plan builds, so I organized it in this google sheet:
https://docs.google.com/spreadsheets/d/1yLIru9q0Qgjll7_lx1tT32mH7PaDw--MVUwGktO9Xjg/edit#gid=0 Please let me know if you find any errors, I believe I transcribed the information accurately, but I had to do so manually.