OnT: I'm going to assume you have War Mode on.
WM talent 1: Void Origins (instant cast VoidEruption) It negates the long cast time, plus you're always on the move.
WM talent 2: filler, I suggest Psychic Link. %MB dmg is shared on all targets with VT.
WM talent 3: filler, Psyfiend is good to slow mobs + healing redux is just added benefit.
Your Q&A: Go into VF on CD. Uptime is not a thing anymore. There's only two situations where you don't use on CD. If like 1-3 mobs are about to die, and you're about to pull the next pack and 2, essentially the same thing, you know grouped up adds are about to spawn. Both of which are not in solo pve content barring some rare mob.
T1: SW:V
T2: I prefer B&S. If I'm trying to get out of a WQing zone and get attacked by too many mobs. Fear + B&S out + rocketbelt.
T3: I use Misery for Quality of Life
T4: Psychic Horror. Good for when you want a mob to be locked down, then you can react accordingly.
T5: Crash. Usually I'd pick SW
. The reason I choose Crash is simple, maybe I'm WQ and want to join a Mythic group or m+, Crash is better, I don't have to keep hearthing back or wasting a tome to change talents. Essentially SW: D or Crash.
T6: Bender. You use Bender, allow it to smack the target, Fade. Bender now has aggro. Gives you time to free cast..
T7: DA, in solo PVE u can use on CD or stack it with using VErupt then DA. Extra burst.