The Templar Discussion is quite overloaded with healing/tanking/stamDD/pvp stuff, so I guess I start a discussion about pve magicka Templar dd.
First a little overview about my comment:
1. Tested Setups
2. Channeled skills/cast time
3. Sustain
1.Tested Setups
I tested the most common sets: Acuity, Julianos, BSW, Master Architect, TBS, Jorvulds, Zaan, Ilambris, Grothdar, as well as Elfbane and the new set Sirorias.
And tested different skill rotation: A more static rotation, using heavy attacks, and dynamic rotation with either Puncturing Sweeps or Force Pulse as gap filler.
I used high elf Templar.
The lowest dps I got with those setups was like 36k, the highest setup left me with around 43k dps. I had some minor mistakes in my rotation, so I guess you could squeeze out maybe like 2k more dps.
2. Channeled Skills/ Cast time
From what I have tested, light attacks hit really hard. In order to have high dps, you just need to do light attacks in between skills.
Here is where I see an issue of templar skills:
Radiant Oppresion:
Many People complain about the low dmg of that skill. At my testings, Radiant hits with an average dmg of ~40k, which is not that much lower then Nightblades Impale. The problem is, Templar has to use beam for 2,9 seconds and cannot do any light attack or other skills in between. So maybe adjust the dmg of beam to compansate for that, or make it to be friendlier to use in a quick, dynamic gameplay.
Solar Barrage:
I think that skill is really interesting with light attacks beeing buffed, and empowered buffing light attacks by 40%. Solar Barrage gives Templar the empowered buff for four times with activating it only once. It additionally does some good dmg as well. The issue here is again the cast time, along with the need to stay in melee range to hit the target. Just to get the empowered buff, you actually don't have to hit the target with Solar Barrage though.
Imo, the cast time of 1,1 sec makes this skill not worth using in pve. Maybe it can be changed to be instant skill or adjust the benefit of that skill.
Puncturing Sweeps:
Here I see the same Issue Radiant Oppresion has. The dmg from sweeps doesn't compansate for the longer using time, where you cannot do light attacks in between. When you have to interupt Sweeps (for blocking, or moving) you loose even more dmg.
3. Sustain:
I think magicka Templar is still too hard to sustain. On static rotation with heavy atack every ~8-9 seconds, you can sustain it. When you want to play fast, dynamic rotation without heavy attacks, magplar has to use Channeled Focus and mag regen Food, and then sustain still is hard to manage and you loose dps again if you go for more mag regen. Channeled Focus is a really nice skill as long as you can stand on the same place for some seconds, which is getting rare in every new dungeon/trial. The ressources, you gain from using heavy attacks on offbalanced targets is really big, but it most often is really hard to gain that ressources as the offbalance window is so tiny, and it sometime is really hard to see if a target is offbalance. Puncturing Sweeps are quite cheap to use, but lack some dmg as I mentioned above.
To sum it up a little:
With the current changes of gameplay, in order to have some good dps and be competetive to other classes, in my opinion, magicka Templar struggles when it comes to using a dynamic rotation with a lot of light attacks in between. That is because of sustain issues and channeled skills or skills with cast time. It would help a lot to give templar either better sustain, or change some class skills (like Solar Barrage, Puncturing Sweeps, Radiant Oppresion), so templar gets a small dps-boost.