I recently got back into the game after having not played since closed beta. My main then was Templar and I loved it so much I had to come back to it now. PVP was also my favorite thing to do and my build then worked well for me, but I can't remember what it was exactly and a lot has probably changed since then making some skills I liked better or worse. I will be doing a lot of PVP again, so even though I do want ot be solid in PVE, my main concern is being very effective in PVP.
I might always be slightly behind with a mag build because I'm a Khajiit and I picked that because it's my favorite, not because it works the best with the class. However, if I went too much stam then it seems like I wouldn't be able to be an effective healer and I don't care for that at all since I quite enjoy healing in PVP... But I also like to DPS and tank.