i did not decide it yet, the thing is i love Tuanha CR´s but the Oracle has all in for ALL healers specs...idk...maybe i will choose Tuanha and see what i do with my Priest its like only one more heal spec vs all the rest and i think Tuanha work is amazing.
What healers are you playing? I've gotten pretty much every healer to 90 and have 3 at level 100. Oracle excels in some spec but other routines take over for other classes.
Right now you can use anything if your playing a Disc priest though since spamming PW:S will literally put you at the top of your raid.
So far in my experience, KingWoW2 is amazing for Disc Priest!!! I use Oracle for Holy and Resto Shaman, the rest i use Tuanha. I have not tried any of the Gladiator line and Leaves is supposed to be boss for Resto druids.
I just want to throw out that anyone can be an amazing disc healer since its just PW:S spam 50% of the time unless your CoW talent then it would be 35% PW:S 15% CoW.
My point is all routines should being doing well as disc in PvE.
I hear what you are saying about Disc and bubbles, but KingWoW Disc CR is way more than that. I have it hot key'd to bubble spam but on it's own it is topping meters without it. I own a lot of CR's and play healers more than anything and just saying that I think it is the most efficient by far.