Looking at a more recent Butcher parse:
https://www.warcraftlogs.com/reports...pe=damage-done
Tiger Power: 97% good
Fists of Fury: 8 of 9 casts
Rising Sun Kick: 18 of 31 casts -
not good
Chi Wave: 13 of 16
Touch of Karma: 1 of 3 -
not good
Chi Explosion? Why would you take that over Serenity?
TEB usage looks fine. You missed a bunch of DPS by casting RSK every 14s instead of every 8, thats a lot of DPS lost. Definitely use Touch of Karma more proactively if you know you won't need it defensively.
Other than that its just your gear. If you're being benched for raid utility then your dps won't matter, although in a heroic raid I'm not sure why anyone would need to be benched.