Sylvan vs. Necropolis

I don't even know where to start, but I think relying on "grass" isn't very effective. Although, if the map doesn't have a mentor, it's quite viable, just take it earlier for maximum benefit. "Ving" - sharp mind? ... I don't even know, I'm not talking about elves. Seems okay, but don't discard speed boosts. The other aspects, the great minds will tell you.