I like the Mind Freeze, as part of the rotation.
Automatic and mindless.
Whoever the kill target is, it gets a Mind Freeze every 2.5 seconds.
Talented, that is runic power and rune free, so will fire off every time.
Might be diminishing returns, but a given target shouldn't last that long.

Strangulate should be its own key.
On round-robin.
I've not set this up yet.