It feels weird but fine under the circumstances of slow 2.5-2.45 GCD of you remember to make certain you are empty or 2-1 charges going into the 2 mins while 1 min remains the same full cartridge prep.

It's the fast 2.4 GCD where it gets clunky, especially if you have any lag or minor downtime during the burst. Needing move sonic break or the end of the lionheart combo to your last second of no mercy can be a gamble where those hits miss no mercy because of mechanics or lag.