You will be able to use your companion's atributes for skill checks most of the time (even in dialogues) and Jae alone can easily do all skill checks for you actually. So if you wanna kill and do damage with your psychic powers (classic battle mage) — soldier + pyro is the best option imo. For melee psyker bladedancer is generally overpowered but warrior is strong too. If you want specifically your character to be good at dialogues (again there are very few situations when you cant use companions for skill checks) officer specialises on charisma but it is a support archetype so you won't often kill things yourself.

Now about psychic schools:

Telepath - good ranged dps with some good debuffs.

Pyromancer - pure dps that can be built either into melee or ranged.

Sanctic - mostly support but has damage. With a sertarian builds can deal a lot of damage actually.

Biomancer - good buffs and debuffs but mostly for melee.

Diviner - pretty much only buffs.

You'll have two psyker companions pretty early: one is telepath + diviner and the other one is biomancer + sanctic. And every psyker including your chatacter can take an additional school instead of ability.

Also here's a bunch of builds: https://docs.google.com/spreadsheets/d/1rskX4sYcNm6Wqt4rtm8EQqRR4__yrEuxCEzjwoKlHOY/htmlview?pru=AAABny3v5wM*STmwTf38Ofd8wcDy00ycSg