Does stack healing work for non-abuns?

So i think its known that you can micro with abuns to have all them focus heal 1 unit

But I dont think its known or common knowledge whether you can say take 5 priest and have them heal a single unit?

I think normally people just have the priest heal automatically.

I just played a game where I think I only had 1 cav that was healable but i could select 5 priest, click on the cav to heal and it looks like all 5 was healing it but i cant tell whether this was faster or not.

Does anyone who is more familiar with the engine or something would know if this works like AOM?