Help! Bad at triggering..

Hi. I am working on a new map. I the map there is going to spawn monster that attacks a city. But I am really bad at triggering and have done so: Events: Time - Elapsed game time is 30 seconds. Actions: Unit - Create 30 Ghouls for player 12(brown). Unit Group - pick every units in region01 and attack-move to region 02. Thats the way I have done, but I thinks it really confused and some times I can't find what I need because there is so many actions. Help: Isn't there an easier way to do it? and that works better? :\ Thanks already.

That doesn't seem too confusing it sounds like you want to spawn 30 units in region 1 and have them attack to region 2. Basically if the trigger works don't fix it. This is the only way I know of having units attack to a certain place without working with the WorldEdit AI system which I am not proficent enough at to give you advice.