Here, various methods for neutralizing archer skeletons were discussed, which is, of course, vital against Necropolis. So, Slow and Mass Slow are often found on Necropolis heroes, even more frequently than on others, and skeletons don't always stand in one group. Also, it can be difficult against a good Dungeon hero. You should try to obtain Remove Curse as a backup or acquire amulets against Distractive Magic. In general, it can be very important which hero goes first.