Assassination APL changes:
Code:
actions+=/preparation,if=!buff.vanish.up&cooldown.vanish.remains>50
This makes it so that preparation actually is being used.
Code:
actions+=/shadow_reflection,if=cooldown.vendetta.remains=0
actions+=/vendetta,if=buff.shadow_reflection.up|!talent.shadow_reflection.enabled
These two lines must be above crimson tempest for the cooldowns to be used during 5 target aoe.
I found that the preparation fix is a dps loss on 5 target aoe, which makes sense since you've got infinite energy anyway and it's only a wasted gcd.