Different types of heroes in Heroes 2.

To begin, let me remind you: for the defender in a castle, ballistics is an ABSOLUTELY useless skill that doesn't affect anything. It's impossible to control towers in the second Heroes game.
Ballistics is good for prolonged sieges or in the case of a large number of low-health archers (the Elven castle!!!). If it's offered for free, in special buildings, I almost always take it.
Star Wars is definitely awesome, as are Necromancer heroes, as the highly respected and experienced Horn wrote.