Grim Focus / Merciless Resolve - When to trigger it with the new patch (RANGED NB)

Anastian

Hi all.
I noticed how after the Dragon Bones update the Grim Focus counter for ranged weapons does not increase upon firing the staff / bow, but rather when the projectile hits the target (or.. some other wonky case. I couldn't really get the grasp of it, the counter feels rather odd). Given this, and given that animation cancelling through light attacks is very important for any NB, when do you guys fire your assassin's will now? Do you wait those 0.2 secs for the 5th attack to hit, then fire the AW or do you go for la-skill-AW proc?
Please help me getting the grasp of this as my DPS feels way sub-par after this bug. Thank you!