Necropolis or Castle (Which one is stronger?)

Don't say that if they moved faster, they would be the strongest.
Just look at their defenses and Holy ability.

That's exactly what I mean, they move terribly... their speed just kills me. Except for noobs and/or angels, all the other heroes are slow... very slow... even the Logistician...
And magic can be acquired somewhere else... :D :D :D