Stop trying to add lifesteal to warlord's bloodlust, it conflates with grasp of undying.
FoB is our "windup" cap, and GoU is our "sustain" cap. They support different PLAYSTYLE, not class. That was the whole point of the mastery rework, so classes could go down different trees for a different playstyle.
Not wise to make 1 try to do 2 at the same time; destroys choice. Either it will be so weak at both it won't really modify playstyle, or so strong it must be chosen on the basis of power alone.
Crit's "best feel" case is burst not sustained, mid tree not left.
In order to rig crit for left: A stacking move speed buff on crit would work. +5% move speed decaying over 4 seconds, for example. Stacking armor shred on crit would also work, like 3% armor shred for 6 seconds.
