Nuke it. Start From Scratch.
This Keystone is useless or is it in the wrong Tree..?
Problem with this is that the whole point in crit marksmen is that they do sustain dmg(until very late game where any one AA can 1shot), so while you can go hail of blades on them it's better for assassins that rely on auto attacks(which dont exist) no assassin would choose HoB over Electrocute and this rune is solely for some niche build and or champion.
Edit: Ive always seen Precision Tree as Back loaded dmg and Domination as Front Loaded. Domination Tree is to accentuate burst dmg. Is this an attempt at changing it up? or to possibly get more stacks of Rageblade off on an opponent? (nerfed btw)
For Hail of Blades to be viable enough to be taken over other Domination Keystones it would have to be buff SIGNIFICANTLY and ofcourse then it would be taken either way, which then it wouldn't be a case of it having a place, it would just be overpowered.