I don't know how balanced these heroes are, but I'm very concerned that all the heroes have practically the same set of artifacts: a ring with 20 initiative, a half-set/full set of dwarves, a half-set of darkness, and a necklace of the blood claw.
Actually, I once wanted to add new heroes...
I planned for 3 archetypes (level 20, 2-3 months of progression; level 30, half a year of progression; level 40, a year of progression).
But I only got around to the 40-level annual progression because it's still easier to balance than the 20-30 levels.
But, of course, the uber-late game also has its drawbacks in terms of artifact variety... you definitely can't win without the Berserker's shield and the boots of slowing, you'll only lose.
Nevertheless, playing with my brother, even with the same half-sets or full sets of dwarves and rings... heroes of different factions and different specializations still feel different. So I think the result is quite decent (I'm talking specifically about the balanced 40-level archetype).
I would also like to clarify that the "ring of speed" and the "staff of the underworld" in Armageddon's Blade, if equipped, consume 4 defense and 1 luck.


In any case, you can go to the DuelMode branch on the server and express your opinion on which heroes and in which variations you would like to see - Discussion here.