The issue is ; You need a #2 ability to break a stomp (yes our single target is kinda sucky, but still). This is why you cant move fetid to #2. You also cant make #3 instantly available on down, this is evident when you look at some of the #3 abilities some other classes get.
For these reasons I really don’t think its viable to have the #3 ability off cooldown on the activation of the downstate.