Get Sturdy psionic overcoat (tac vest made using sturdy vest, psi beetle carapace, black cloth) asap. The key part is the psi beetle carapace which grants -10% psi cost. You can and should rush-craft any tac vest using psi beetle carapace as early as possible.
Weapons: try to get Sørmirbæren Spirit Staff asap. Sørmirbæren Spirit Staff > Høddurform for this build even when using Neural Overload. Damage over time is moot with your 1hitko Neural Overload.
For boots wear ninja tabi majority of the time for stealth and MP bonus. Switch to other resistance specific tabi when situation calls for it: infused mutant dog tabi for acid resistance, infused heart breaker serpent tabi for bio resist and so on ...
Psi headband: This is the most important crafting aspect of the build.
For legacy branch you want Universal Psionic Modulator, Proximal Neuroscopic Filter and Stable Neural Amplifier
For post psi nerf game you want school specific psi headband - initially you will only be using two psi school: Meta + TM, so you should be wearing psi headband crafted using: Metathermic Modulator, Proximal Neuroscopic Filter, Stable Neural Amplifier. You should have a secondary Meta psi headband crafted using: Metathermic Modulator, Magnifying Neuroscopic Filter: Cryokinetic Orb, Psionic Mufflers for locus hive bombing.
You need 75 base thought control to get Locus of control at level 16 but you won't be using TC at all until you have a Scanning Thought Control amplifier psi headband crafted using Thought Control Modulator, Magnifying Neuroscopic Filter: Neural Overload, Stable Neural Amplifier. You should just leave Thought Control at 75 base until mid game around level 16 ~ 20 ish or so and starting maxing Thought Control every level. Because Neural Overload is silent you can switch to a TC load out to quietly assassinate/thin out npc crowd. Make sure to activate a cloaking device, wear Scanning Thought Control amplifier psi headband, ninja tabi + infused cave hopper leather armor with black cloth as stealth is on the low side.
My psi abilities loadouts are as follow:
Meta + TM frontal assault mode
Stasis, Psycho-temporal Contraction, Limited Temporal Increment, Cryokinesis, Cryokinetic Orb
Pyrokinesis OR Thermodynamic Destabilization, usually pyrokinesis as thermoD can only be triggered using grenades.
TC + TM silent assassination mode
Stasis, Psycho-temporal Contraction, Limited Temporal Increment, Neural Overload, Mental Breakdown, *any TC abilities, usually Pseudo-spatial Projection
Towards the end game once I have everything setup I just used the following loadout and didn't bother to change it:
Stasis, Psycho-temporal Contraction, Limited Temporal Increment, Cryokinesis, Cryokinetic Orb, Neural Overload
Lastly make sure to visit food vendors often and buy up all available Pickled Mindshroom and Psi Beetle Brain Soup.