What Force said, and I want to add just to be really sure: With your build you need to use sword and talisman. Make sure your buffs are up all the time (Sadistric Soul, Pact of Malacodor, Drain Life or Essence, Covenant of Arms, Aura of Dread Fury). And you can switch stances - use frenzy stance, and if you feel a situation is too hard for you, switch to defencive stance. Also make sure you use your ccs: you have 1 stun (by default, don’t know the english name, it is red), and should have one aoe fear (dooming presence), which is also your highest dps and aoe dps combo.
As you have some points in the general tree I bet you have cunning deflection. Use that right befor you get massiv damage (some bosses have abilities that hit really hard, but most of the times you can tell when they happen from casts/aoes/on timers). In normal fights just keep it on cd.
This is an awesome DT guide:
http://forums-archive.ageofconan.com/showthread.php?181037-Sidar-s-DT-guide
Just in case the old forum has hickups, I copied Sidar’s guide to this forum:
https://forums.funcom.com/t/dark-templer-sidars-dt-guide/27999