Not sure I understand what you mean amigo... but as far as the summoning dolls go I have invested mega points into them in a couple of games and find them just a real pain to keep alive in combat situations late in the game.
I find that a Hero with max'ed skills is far superior to an undertrained Hero and an undertrained Doll. IMHO the Summoning Doll Upgrades are a waste of points no matter how many you put into the dolls (I have max'ed them in Act 5 and they are way too fragile in the dungeons there).
So that is pretty much why I feel they are only useful as mules and trap springers <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
There are some alternatives to mules of course -
1. You have the Pyramids in Acts 2 & 3
2. You have the Enter / Exit battlefields in the main game acts 1-4
3. You have the enter / exit battlefields to use within the battlefields which cuts your traveling in half
But in Act 5 all you have is the Dolls