Personally, I think Fl4k is in a really good place. Just a few tweaks and he’ll be perfect in my opinion.
Except of course dominance. That skill needs an entire overhaul.
First off, it looks so boring! It definitely should not be just a normal melee swipe. Melee override skills looked cool in bl2 (Even though they were kinda crappy dmg wise) Perhaps a special animation where Fl4k brings out a whip, unravels it and then whips an enemy. Just a simple 1-2 second long animation. This could also be used as an excuse to increase the range of the ability, since getting up close to enemies in mh10 is a death wish.
Secondly, it should have a much longer duration as it feels like no time at all to make a difference during gameplay.
Thirdly, the health drain on the dominated target is so little. It should either guarantee death of target at the end of the duration (minus bosses of course) or do enough damage to kill an anointed militant, and this damage also scales to mayhem levels.
Fourthly, it should give a scaling damage boost to the dominated target. The higher the mayhem level, the more the damage boost increases to cope with increased health values.
Finally, it should do at least something to bosses. At the very least stun them for a few seconds.
(It could possibly also be used to buff your pet with movement speed or damage )