Whats the focus your looking for? PVP or PVE? All templar tree's are soft, i would even say softer then Night blades tree's. Its just unfortunate a decent chunk of night blades abilities/passives dont even work. If your going a caster build i would without a doubt go a sorceror instead as they get excellent CC, excellent AOE, Excellent mana maintenance the templar gets next to none of any of those.
All parts of the game which include PvP as well as VR content all the way to VR10 and the ability to go into public dungeons and solo packs while playing smart off (meaning drop AoE then hold block as you spam Pulsar).
I believe the above build can destroy most 1v1 and especially Sorcerer if the Ultimate is up.
I tried this build and all I can really say is that it didn't remotely work for me at VR3. In fact, I felt so useless, that I've decided to stick with a build I know that works, and to stop trying others.