Certs you spent that were totally worth it

C4, great for taking out wounded vehicles and sundys.
IRNV and smoke launcher is great for getting close to enemies and vehicles and mowing them down.

Med and repair tool upgrades, flak armor (non-MAX, since it wasn't buffed too), and the 2x reflex sights.

Underbarrel shotgun for my solstice SF.

1 shot kills heavy assaults with full shields up at close range.

AP Mines.
Repair Tool.
Reload Speed for main and secondary gun on the Mag.
Rival Combat Chassis.
Nano-weave armor.

My top 5.

Tank mines

4x scope and sunderer mobile spawn.
Also, ammo deployer for sunderer.

I definitely gotta say that my Medic certs were the best spent: Revive Grenade, and maxed out Medic tool/utility means HUGE exp gains. My record is 18 revives at once with the grenade...can't argue with that!

dual max bursters with extended mags.

Med tool was totally worth it. I'm on the fence about the repair tool, though.

Bulldog for the Sunderer - awesome anti-infantry weapon
Bulldog for the Liberator tail gun - can actually shoot ground stuff with it, resulting in the tail gunner not getting bored
Anti-Tank mines for the Engineer - Fun times
Vanguard Shield - Very helpful if you time it right
Kobolt for the Flash - Because hunting down other Flashes with it is hilarious, nevermind what it can do to infantry and hoverscythes
Level 1 Autorepair for the Flash - Such a good fit for the Flash that I don't think I'll ever require a higher level autorepair

Extended mags for my dual Hacksaw MAX (two times 500 certs)

AT mines - AMS sundy

and the faster repair on engi, these vehicle zerg days it is all i ever seem to do..

Engineer:
HEAT for the lightning
Level 2 AT mines
Level 2 Prox mines
Solstice SF/UBGL

Infiltrator:
Grenade Bandolier
Prox Mine
Forward Grip, 2x and 4x, and compensator for the Nyx
Level 3 scout radar for my Flash. Makes outpost infiltration a snap, can see them coming before they even know I'm there

- Flak armor 1 for every class.
- 75m scout radar for my flash. A 150m diameter radar on a vehicle small enough to be hidden inside buildings. Saved my life more often then I can count, and is especially valuable in small squad vs squad fights in remote outposts.
- AT mines
- LA C4

C4 ,Jaguar , stage 6 Jumpjets for Light assault

Full flare/smoke for lightning and ESF. Thermal for every vehicle gun.