Level 6 creeps

Stupid creep above level 5 are treating spells like heroes,
is there anywhere I can change that, I looked in gameplay constants and didn't find anything similar.

What do you mean "treating spells like heroes"?

They act like they have resistant skin by default.

So you mean that when fighting creeps that are lvl > 6, the normal units cast their spells as if the creep is a hero?

yes, >= 6

Are you sure that it is set in AI?

Try changing the Hero XP Gained - Creep Reduction Table in Gameplay Constants. That's the only thing that seems related to level 6 creeps, so maybe creeps that give 0 XP gain hero like status. Do level 6 units (that aren't creeps) react to spells like heroes?

Ah yes that guided me in the right direction.

It turns out that it depends on race,
only creep race has resistant skin after level 5
all other races humans, nagas, demons, critters behave normally.

Now all I need is to change race to a bunch of creeps...

+1 for you.

For more info: http://www.battle.net/war3/neutral/creepbasics.shtml