Helix's duration gets cut in half along with strength doubled each modus, thus after 8-9 its duration is cut down to about half a second but its strength 60K a tick or some shit like that.
The problem is the schs need to time the modus barrage to line up with one of the ticks so that the helix doesnt wear between ticks, but instead lines up with it so the ridiculous 552 or whatever times multiplier is applied to that one tick they got.
XI Wiki



