Stupid Creep won't use warstomp!

[Shoto]

I am creating a map that I'm calling "Hero Dash".
However, I have got a "boss" creep (lvl 20 Hogger )At the end of the map.
But, he just won't use the Warstomp ability I gave him.
I have been playing with triggers so he can learn all four spells he is supposed to have, and everything works.
But he refuses to Warstomp.

How can I fix this? Can i make some kind of trigger that forces him to Warstomp when at x% health?
I would really appreciate help, 'cause I have put alot of work to this map.

Please, reply to this post with an answer! I'm getting desperate!

 

[z00rtaz]

• Untitled Trigger 001
  • Events
    • Unit - Hogger <gen>'s life becomes Less than 50.00
  • Conditions
  • Actions
    • Unit - Order Hogger to Orc Tauren Chieftain - War Stomp

Change the ''Less than 50.00'' to whatever you like =)

 

[Damage]

By default, computer controlled (or neutral) will only use Warstomp-like abilities when surrounded by at least 3 enemies.

You could also just force him to cast it via

• Unit - Order (Unit) to Orc Tauren Chieftain - Warstomp

This is a Unit: Issue Order with no Target action.

 

[Shoto]

Thanx so much! I tried to do something like this, but i couldn't find the right Action! + rep to both of you

 

[cboy123]

Hmmm do something like this
Do a trigger when the boss is attacked.
Then create 5-10 attackable-dummy units on its position
Order the dummy units to attack the boss.
Then create another trigger
when the dummy units attacks, kill them.

 

[Netherdrake]

You can make it so there is a % chance that when he is attacked, he will use the ability. These triggers probably solved your problem though.

 

[Shoto]

Yea, thanks for creative ideas, but i have already made him Warstomp when at 50% hp