What skills should Necromancers take when facing Orcs on a very large map?

LordViRuS, Heh, imagine if their hero is level 1. Hmm... and what will happen to your goblins. Plus, they place them near cyclops and shamans. And? One good spell, or even a charm, and the goblins are done:p. Half of them will be wiped out. And... that's it, your goblin rush will end. And, if we're talking about a large map, level 20 is still a bit of an understatement; it's more likely that they'll crush you, and you'll be left with nothing. And even without your goblin rush!