Quester (dont) Wait condition

I need a "Dont Wait" condition. It should be a negative condition, because I want use the same code from the Is-Complete-Conditon from the quest below (or before).

Reason: the (now) unnessessary waits (I use some of it) are added (2000 here, 5000 there, 15000 next ...) if the code is restarted in the middle of a run.

exsample :

pulse - kill boss A (is complete: boss A is killed)

wait - 2000 (dont wait: if boss B is killed) // waiting for the boss

pulse - kill boss B (is complete: boss B is killed)

wait - 2000 (dont wait: if boss B is killed) // waiting for dying

lua script - loot boos B

wait - 5000 (dont wait: if boss B is killed) // waiting for loot

for the lua script there is no "Dont Execute" condition needed (in this case) but it would be nice also.