That is a pretty good guide, it pretty much told me what I suspected.
That is very unfortunate about the shamans. Since most elite units can heal themselves anyways, this makes them slightly less useful. Particularly since your default hero gets the same abilities.
One unit I have started to REALLLLY love is the Dwarf Champions, they are beast.'
I have one that hits for like 1500 and the other is like 2100
Not many things can stand up to that, and they have great regen and maxed armor.