I always prefer combat knights because, in my opinion, the absence of a penalty in melee combat is much better than maneuverability. I have never had any problems with dwarves and bone warriors when leveling up. It is quite possible to defeat a horde of such units with minimal losses (or even without any) using combat knights and trappers. Regarding the horde's war cry, I meant that it is equivalent to a combined war cry + damage, so if it drops, you need to get the maximum benefit from it. Terrifying roar and war cry are, of course, more attractive than the chieftain's command and the horde's war cry, but they don't always drop :( Regarding the chaos and darkness artifacts, that's true, plus you definitely need to level up the perk for pushing the hero back in ATB. The summoning artifact also has a cool perk called "return to the void" (triple damage to summoned creatures).