I have managed to find a method that consistently provides you with 11 WW (sometimes 12 WW) as long as you fulfil the following conditions:
Have at least 5 targettable oGCDs up (3 x aetherflow stacks, 1x Tri-D & 1x Addle)
For each oGCD weave, use it in the middle of your GCD cast. I.E R2 (0.5 sec wait + Fester) → R2 (0.5 sec wait + Addle)
Remain stationary as much as possible
Decent Ping (I have heard that people are unable to get 11 off at ~ 190ms)
The rotation is as follows: R2 (Aetherflow + Bahamut) → R2 (0.5 sec wait + Fester) → R2 (Akh Morn) → R2 (0.5 sec wait + Fester) → R2 (0.5 sec wait + Addle) → R2 (0.5 sec wait + Fester) → R2 (0.5 sec wait + Tri-D) → R2 (Akh Morn) → R2
*Note 1: It is possible to get 11 through other variations, just that it may not be as consistent. I am currently still in the midst of figuring out the exact portion of the rotation that is causing 1 WW to be missing in many variations (People are usually getting 10 WWs).
Note 2: The best timings to use R4 procs is either through swiftcast or to hardcast it right after an Akh Morn.
Note 3: There is currently an issue where Akh Morn or the last WW in Bahamut does no damage to the target if executed below 2s left on the timer. The animation still appears and ACT registers the damage but it does not appear in the in-game combat log.