I don't see any arguments why only Tant (Necropolis) can do so well on this map, and not a Tower or a Conflux... even though I myself like to play as Tant, because he does it with the least effort!
And besides, why carry all this rabble with you? You can divide your entire army into 3 strike forces (capable of defeating everyone) and speed up the offensive, winning 4 times faster!!!
P.S. I wrote 4 because 3 armies + 1 will be added to mobility... for example, one hero with only archers - I move faster than with archers and skeletons!