@KinodeKH Odds are that it does fill with melee attacks otherwise how would you refill during boss encounters that don't have mobs.
But this dev team for better or worse have surprised me in many ways with how they design/balance game elements so who's to say!
@KinodeKH When in the trailer though? I've seen the footage a ton of times and only saw the gauge fill one time at 1:04, at the very end of the cinimatic RC and just bearly, which made it look like it was from an enemy drop.
And the only time he does melee attacks he doesnt have the meter