Yeah, in general it's best to start with your most important stat at 10, and put most of your future points into it.
For example a Sniper usually wants 16 Perception.
A melee build using combat gloves wants at least 14 Dexterty.
Pure psi builds likely want 16 Will.
For psi, I think that it really depends on how/what you are planning to use it for.
As an example you can run 3 Willpower and most Temporal Manipulation abilities still work fine, as most of them don't scale.
A psi Sniper can have 3 Will and take Metathermics mostly just for Thermodynamic Destabilization, as it's still really strong for such a build.
So, in general, you should take most of your attributes only just barely high enough the get the feats you want, and sink everything else into your "main stat".
One big problem I see with your build is that SMGs are stat hungry.
They want 10 Perception and a lot of Dexterity (16?) to reduce their action point costs.
That doesn't really leave you with a lot of attribute points for things like Will.
You also have 4 STR for... some reason?
I'd also argue that Clothier isn't a great feat to pick.
It only applies to Black Cloth, Kevlar, Blast Cloth and Aluminized Cloth.
A 20% quality bonus to those isn't too impressive.
I'll admit that I've never played an SMG build, but I would imagine that they would always want Expertise.
It's bonus applies to each bullet separately when using burst fire.
I think that assault- or snipers rifles would work better for a Psi gun hybrid.
You'll need 5 STR and as much Perception as you can get, but you could dump dexterity to 3 and put those points into Will.
(Edit: 7 STR if you want Full-Auto for Assault rifle.)
Mind you that's not to say that you need a completely optimized character.
My current dagger-psi hybrid will only have 15 Dexterity instead of 16 because I put 1 point into Will for Locus of Control.
...but if your main stat is below 10 you'll almost certainly be in some trouble.
