As tac you don't need any ground points for pve. Just grab the Fire Team kit, a Pulsewave and the Type 3 Phaser rifle from Night of the Comet Devidian Mission.
Furthermore equip your away team with either pulsewave or miniguns and train them Mine Barrier1, Phaser Turret 1/2, Quantum Mortar 2 (Eng ones). You should be able to play every mission within 10mins. (Except for STFs of course)
This way you can save a lot of skill points and have more for your space build.