yeah, overall balance is interesting. as its not just the Hero. its the Hero, their starting cards, and overall race/cards.
there is no rng on starting cards.
Like, Stygian guard, tethys himself is amazing. super powerful hero.... but, frozen lance blows. his starting cards are garbage. (1 mana, deal 10 damage to the front enemy unit)
"Frost enemy unit" cards/abilities are pretty trash. as you want to be able to snipe, want to possibly self target, etc. "front enemy unit" abilities need to multihit, or hit just insanely hard to justify their use.
because frozen lance kind of sucks, Tethys has a ton of RNG on wins. you need to get other cards to combo with him.
Hornbreaker prince's starter card is Torch. (1 mana, deal 3 damage.) way more versatile. scales with conduit or pyregel easily. or can target yourself to proc revenge, kill 1 hp units that do things on summon, etc.
My last hornbreaker win, was carried by pyregel, 2 magma cultists, and 2 immortal stone "molting imps"
"incant" enemys gain 1 pyregel" x2. (with a bunch of pyregel artifacts). i would just summon and kill the impos over and over. the spell used to kill the imps would just stack aoe pyregel, then the imps would deal big aoe..
so, its probably easier to actually build off those burn cards for hornbreaker, then him.
Fel is another good example. SHE is a pretty powerful hero... but her starting cards kind of suck. (just cause) is very situational/specific. with valor only giving armor to the front unit, "after combat". once it builds up armor, sure. but, it has to survive first..
While Greal is strong as HE is strong, and his assistant cards feed directly into his builds as well. like no rng at all.