That was before a few weeks ago before they reverted us to 3 Chi per TeB and 10 stacks and 20 max. Until this patch we were a bit above where we are on live. The changes are a nerf but workable in terms of tuning. The previous version of TeB felt almost like a Rogue Slice and Dice where you are trying to keep it up as often as possible. The ability was originally designed as a cd to use for burst dps. By lowering the 3 Chi per TeB to 4 Chi returns the ability to it's burst roots. But in order to increase the chance to get 10 stacks, they buffed the Mastery (2% every 600 Mastery to 2.5% every 600 Mastery).
The Tier 16 4-piece made for some awkward gameplay if you had 10 stacks going. having your next 3-4 abilities only cost 1 each caused some Chi capping issues. Having it only work every 10 makes it not as awkward, but they may have over-done it on the nerf. Need to do some math on it. I'm thinking (though I like I said I don't have the math in yet) it's only going to provide 3-4 extra Chi per minute. not a whole lot if you ask me; compared to the 6-8 or so it was before.
Overall, I'm still holding out another week. There maybe some later tuning to abilities that might help.