(Hero - Rogue) in Heroes 4

It would be better if you told me what skills you are developing in your thief, besides stealth. Personally, I choose either Chaos or Death. In the first case, you get a decent mage, and in the second, poisoned weapons/arrows are very useful...

Hmm... I develop... combat... and then nature magic - at least up to level 3, so I can get my favorite spell, "Giant Strength." But if nature magic is developed to level 5, that's even better... when you cast "Giant Strength" and "Dragon Strength" on yourself, you get a pretty good combination...