I have noticed that my healers always cast their heals twice. its like this bot reads the hp, then casts a heal, then reads the hp again before the cast is finished so it casts a 2nd heal which is not needed.

I have also been working on a warlock fightclass and it tries to use the wand while the GCD is still going, so it never casts because you have to set it to only try one time otherwise the bot just spams the shoot button but it wont actually shoot anything.

Is there a setting where I can make the time between spells longer?

Noticed this as well when playing on WoTLK

Hello, use "timer" option at your healers spells (your server have probably too much latency) (by sample, if your spell is cast in 2 secondes, put in "timer" option "2500" (=2.5 secondes))