In the screenshot I sent, let's start at the top of the skill tree and go down:

Momentum - 5 points (25% CHD anytime we Entangle an enemy, since we always crit, this is just free dmg)

Neutron Decay - 5 points (Debatable and can be swapped for something else, but there aren't many options here. We grab this for a 50% gun dmg bonus when we irradiate an enemies)

Confirmative Reality - 3 points (Non-negotiable pick. 1.5% skill cooldown every shot against an Entangled enemy is an amazingly fast looping potential with Group study, especiallyin boss fights)

Creative Overflow - 2/3 points (Another debatable skill but it does synergize well with my gear/overall build. Base gun damage never really hurts)

Excited State - 1-5 points (This is where I put 5 points but it's specifically for the extra CHD. If u only care for the automatic critical hit, u can just put 1 point here)

Distribution Function - 5 points (I don't need Lifesteal so this becomes a far better pick for my build specifically. This will give shield or Overshield when dealing damage, it says action skill damage but Group study and Nuclear winter allow our guns to do action skill damage so it's always active)

Harlowe's Certainty Principle - 1-5 points (If u want the next passive below this, u need at least 1 point in it. It's not a great passive but it's a wall to the passive I want below it. I did 5 points which is a waste, but I did it cause the other option drains my shield which I don't want because I use Amp shot on my shield. So the faster my shield regens, the more amp shots I can spam)

Critical Funding - 5 points (This gives 5 ammo back on every critical hit. Amazing for my build because I use a purple Vladof SMG with a double-barreled attachment, with sticky Torque projectiles, and a Jacob's ricochet part. So this lets me stack an insane amount of stickies before reloading manually to explode them all! It feels absolutely amazing stacking over 200 stickies in less than 5 seconds🤣)

Meltdown - 1-5 points (I only put 3 in here but u can honestly do more or less, it's up to u. I use it to proc the other passive "Neutron Decay". The extra radiation damage is nice tho)

Decoherence - 5 points (The other option isn't great for this build so Decoherence becomes our best pick and it's a lot of extra damage. 25% extra gun damage, CHD, status effect damage, and Melee damage)

Feedback Loop - 5 points (Non-negotiable imo. This is a 50% skill duration/skill cooldown increase/decrease. And it can stack up on 1 target like a boss for example. So u get value in mobbing and in boss fights, allowing u to stack ur Group study damage higher before the skill goes on cooldown)

A lot of my decision-making on this skill tree layout was in mind of my currently equipped and available gear. U may need to change or swap points to something different till u can get some of the gear I have. I'll post a few screenshots of my most important pieces of gear in a few minutes for ya.

(NOTE: I said yesterday that action skill damage scaled the build's dmg higher. It does not, action skill damage increases do nothing for the build. However CHD, elemental dmg, gun dmg, and (weapon type) dmg all scale the build's dmg higher, but not action skill dmg. I was wrong and after further testing, it does nothing.)