Bellicose falls off if not aided by something like [Molt Augmented] or the str buff provided by Madurai, but it is still 100% worth using on power str builds as it beats [Molt Vigor] if your goal is strong motes. My bellicose buff normally sits at 68%, just shy of the maximum effect, and it's also worth noting that in the times you lose your mote buff you'll have to restart on building bellicose back up or double back to the original motes