What would you prefer for battles? Better Units or better Heroes or both?

[MrRomanticGameGuy]

I'm now planning a mod where each unit has 4 different skill which can be actiaved for different tactic. Do you think that is enough or should each unit should get more skills and should be powerful like a hero?

Example: Should a mage unit get the sheep spell or should the hero mage class should get this spell? Really hard to decide because when you have 64 Units with 8 instead of only 4 skills then there will be nearly no skills for a hero that haven't been used for units. xD

When using 8 skills for each unit i think, there will only be place for passive hero skills liking giving special unites more attack, damge, resistt, etc. or increase spells from units, instead of active skills like slow spell, teleport spell etc.