Accuracy on live indicates approximately 60-70% without +accuracy item increase.
Furthermore, the original description of the thunderkick discipline went something like this:
http://www.eqvintage.com/links/melee-disciplines-2/
Quote:
|
THUNDER KICK (Level 52): When this discipline is activated, the next successful flying kick will do additional damage. The base reuse time for this discipline is 9 minutes, and will decrease as the monk gains additional levels.
|
This indicates that the next time a flying kick connects, it would increase the damage of the kick. If the kick doesn't connect, it wouldn't (or it would use the disc and you wouldn't get the damage bonus till the next reuse timer). This implies accuracy is not supposed to be 100%. Again, considering Verant's original mantra of "nothing is certain," why would they leave a disc up to uncertainty if the melee attack used was certain?