Yes,the skill are based on timer, it will send the key and wait even if ur char is moving to the monster, will try to improve this by reading memory that has a value of 1 when the casting skill bar is visible but definitely take some time.
So its best not to set an long interval between skills in case it skips the 1st skill,like Skill(1sec) + normal att(30sec)+Skill(1sec).
So its best not to set an long interval between skills in case it skips the 1st skill,like Skill(1sec) + normal att(30sec)+Skill(1sec).