NHF – new heroes for Heroes V 3.1.

I think Shadii would benefit more from defense and evasion skills. I can also suggest a few heroes from my upcoming campaign:
Inferno:
Urrg

Advanced Gate opening
Fundamentals of Chaos Magic
Fireball
Specialization: Lord of the Abyss: Cave demons, lords, and spawn receive +1 to attack for each level of the hero. Additionally, they receive +1 mana for every 2 levels of the hero (spawn receive +1 damage for every 3 levels of the hero).

Tarot

Fundamentals of Enchantment
Soul Eater
Army of Imps
Mistress of Imps: Imps, devils, and implings receive +1 to attack and defense for each level of the hero, starting from the first. Additionally, they steal 1% more mana for each level of the hero.