Heroes in Heroes of Might and Magic V: graphics, biographies, skills...

I really liked the heroes of the Вайшан faction (specialist in assassins, the ability to get Improved spells + Lucky spells already at level 4 is great) and Sinithar (reduces the cost of Improved spells - if you level up to level 20, you cast them almost at the price of regular spells).

IMHO
If by level 20 you don't have enough mana, then nothing will help. Even a reduction in cost. Moreover, it turns out that it becomes cheaper by one point every 2 levels. What's the point of such a specialization?
Specialization in units is nonsense.
And the initial set of skills doesn't matter.