I am playing a Demon / Time at the moment.
As far as demons go , they are plain beautifull chaos. I find that Time does complement this very well. Time makes you and your pets very untouchable(buffing defense and debuffing to hit combined with high natural resistance) , maybe not as good as bubblebots but i am sitting alot in front of my screen to wait for one of my demons to get hit. Healing wise , i find it better to have it quick and small then slow and big , as you need the small bursts more then big heals.
Since i upgraded my heals (lvl 46 currently) to be quick and cheap i have upgraded from -1x4(was great exp) to +1x5 and still am waiting to loose a single demon.I do avoid Malta , Nemesis and Knives of Artemis as they plain simply reap me. Knives most because of theirlong duration hold/mez/sleep which makes you drop Times Juncture(Foe-damage - speed - to hit) , a very crucial toggle when it comes to survival. Most likely the biggest issue there is with Time , that this toggle seems to be a must in survival.
I do regret that pets are immune for recharge, seeing this set is having some skills in enhancing recharge of single targets and aoe. Maybe they should make certain skills still work on own pets.
I wasn`t aware of the new aoe buffing that happens , which would make me feel like making a thugs/thermal(personally i prefer a healing set on thugs as they don`t have that themselves.)
Sonic on the other hand most likely will be a killer too on demons , where you can place disruption field on your prince and sent him into the frey