I'm no mathmatician but from my own anecdotal evidence, without having much hit and exp, you can get several misses in a row, be unable to keep shuffle up and it can very well be fatal if you're not saving your cooldowns for that moment, or you get stunned. Which means you cannot organize personal cooldowns for set moments in a fight. Sure you can have pleeeeenty of chi with the extra haste at many parts of the fight but you can and willl get unlucky with a string of misses which increases the RNG factor for your healers, even though you may take less damage overall over the course of a bossfight.