While I think your build is interesting, I don't want to try and do everything as one character. It's more fun for me to say "here's what this character can do, here is what they can't do." and then play accordingly.
Well, different strokes, I suppose
. I wouldn't say that it can do it all but rather is more of an adaptive combatant.
Anyways, if you focus on any single one of those builds, like for example pure Assault Rifles, or pure melee, you may actually find it a bit boring and/or constraining. The first build I beat DOMINATING with was exactly a Heavy Armour, AR Burst build and while it was strong, it was also quite invariant. But hey, if you want exactly that, go for it, man. Also, I want to point out that on DOMINATING there are some new additions of enemies that will change some of the combat encounters. Highly focused characters may actually struggle in different scenarios.
If I had to choose any one of the ones you mentioned, though, I'd probably go with spears just because they offer the most base versatility. Even though you said you're not fond of spreading stats you can actually successfully integrate a single psi discipline with that and make a semi tin can with a Psi Riot Gear and one handed spears with lots of block. Purely theoretically - Metathermics, Melee, Electronics for decent shield, enough Biology to make poison stuff, enough Tailoring/Mechanics to make a good Regenerative Psi Riot Gear and some Throwing for support with poison caltrops/knives/nets/flashbangs/emp grenades. With a good head amp you can reduce Methatermic's cost a lot so the lower Will/Int won't bother you at all. A sort of a techno-scavenger that literally utilizes everything they come across
. If you go for Kevlar Cloth with the Riot gear the character will be quite tough with block, shield emitter and bullet resistance and you won't have to worry about bullets or chems too much. You will be able to make metal Striders boots which will give quite decent MP.