To provide a super basic spit-ball estimate, your ping should be less than 4% of your GCD. (Probably closer to 3.5% for some, and that percentage probably varies when moving further from tests at a 2.4s GCD.)

E.g. ≤100 ms @ ≤2.4 s GCD

In actuality though, not all oGCDs have the same animation-lock time. Even within that 4% perimeter, some will be double-weave-able while others will not. Jump, The Forbidden Chakra, and a couple others take an extra 50% as long as others. Each additional mudra handsign seems to take me about 50% less, or roughly .5s seconds + half my ping at the time.

Alternatively, you can count each skill as being ~.75s in animation-lock time, with at least half of your ping added per step. So with 100 ms ping, that'll be .80s per step, meaning you could only reliably double-weave with at least a 2.4s GCD.


:: To be entirely clear, I have not tested this extensively, nor do I intend to. These ballpark figures are however accurate for the varying GCD speeds and ping range I usually play with (anywhere from 1.95 to 2.47 GCDs and 90 to 240 ping). inb4 berated for imprecision.