Use the NCR trooper as your base guide, not including first recon, rangers or heavy troopers
So Knife,
Combat knife.
Service rifle.
Marksman carabine.
Sniper rifle.
As well as frag grenades.
You could then chain other perks into this.
First recon using a sniper or hunting rifle has a bonus to criticals, requires "grunt" and perception 7.
Or heavy trooper, move faster in armour and gain 5 DR on top of DT, requires "grunt" and strength 6, endurance 6.
It's a good idea, you've got going.