Wrote something up on Reddit for a new VS player. I think it can be adapted to TR.
Ultimately depends on your play style but I personally like having options and find there are definitely some minimum items you need for each class to be complete imo. Obviously, you need to cert into your favorite primary weapon and suit abilities as well but I think these items greatly increase your playstyle options.
I’d buy the anti-air launcher. Only 250 certs. Changes enemy air from an untouchable nightmare to a touchable menace. You can also dumbfire it against infantry and enemy ground armor. No reason to the lock-ground-only launcher as a TR imo.
A single medical kit can also greatly help you stay in the fight longer.
Max healing tool immediately. Allows you to revive people at full health and works farther and faster. Getting revive grenades (200 certs) next will also greatly increase your utility.
A few levels in the Engi tool is nice but maxing it is only essential for disarming enemy tank mines under your Sunderer. Also would max if you plan to focus on driving vehicles.
Tank mines are amazing. Level 1 tank mines (100 certs) get you two tank mines. That enough to kill any ground armor without mineguard.
Underpopped and getting zerged? Setup some tank mines at the next base before the enemy arrive. Cluster them close and hide them near the road, in a bush, under cosmetic rocks, or even the center strip of a bridge.
I’d also consider an mana AV turret but that’s expensive at 1000 certs. Still going to expand your options way more than any carbine will.
A few levels in your jets of course but definitely need two levels of C4 (700 certs). Greatly increases your kill potential against armor (well, and infantry as well).
Default TR sniper rifle kind of sucks. There is 100 cert sniper rifle (M77-B) that functions as a more traditional one-headshot-kill sniper rifle.
I’d also recommend a SMG but they are all 1000 certs.
Buy that second Pounder arm (250 certs). Suddenly, your Max is great at anti anything on the ground at medium range. For vehicles that are farther away, you’ll probably need some Fractures (2000 certs).
Get that second burster arm (1000 certs) to be an anti-air threat.
For anti-infantry, I’d get two Mutilators (500 certs total) and avoid a second Heavy Cycler arm (1000 certs, really?). Two Mutilators are effective and way cheaper than two Onslaughts or Mercies (2000 certs total).
Only part that I’m not 100% certain on is the Max section.