I don't see any contradiction in my words. When I said Kaspar is a secondary hero, I meant that in the context of him not being suitable for rushing.
I repeat: he is needed for rushing in a game against a newbie or on the same "Lands of Outcasts" map. On the aforementioned map, level 15-16 will not be reached in 2 weeks; there simply won't be enough enemies to gain experience from in that time. A more realistic scenario is level 10-11 with skills upgraded to the Plague Tent on a skilled difficulty level (including skilled Necromancy), plus something else skilled with two perks. It will be very difficult to get Fire Warriors in 2 weeks on this map in such a scenario without education. And this circumstance (having education) will not allow the hero to reach level 10-11.

P.S. Thank you for the advertisement, valery, but I'm certainly not a big authority, but I have gained some experience on the battlefields of online battles.