Give legion stacking bonuses for chaining survivors

The current thing with Legion is using killer instinct after stabbing 1 person and inflicting deep wound. This, however, makes him an M1 killer, unable to down with his ability since the safest thing for a survivor with deep wound to do is either continue being chased or to move 3 feet and start mending. A fix for this would to give him bonuses leading up to being able to instantly down the 4th survivor if you manage to chain every one of them in the same rush.

1st Hit - Killer Instinct

2nd Hit - Reduced end-of-ability stun

3rd Hit - Reduced survivor action speed (healing, gen, etc) until fully healed

4th Hit - Double damage (Instantly down the 4th survivor), doesn't apply deep wound.

5th Hit - Double damage, able to mori downed survivors until feral frenzy ends, moris refill the ability bar

This give incentive to run after another survivor in the hope of stacking the abilities, as well as rewarding him with 2nd hit potential if he manages to hit every survivor.

Also, if you manage to mend and then get whacked again in the same feral frenzy after he hits everyone else, in punishes you by giving the legion a mori to kill you with, or to continue punishing others with the possability of moris as well.