Tactics for Necropolis.

No. Without a dragon, the maximum speed will be with the horses (9), which is very low. The opponent can cast a mass slow/speed spell and manage to deal damage from a distance before the Necropolis units even get to move.

In my opinion, when playing as Necropolis, you should accept that you will most likely not have the first turn.
Therefore, you need to be prepared for such "unexpected events." Look for opportunities to engage in melee combat by any means: teleport Skeletons to the enemy, mass speed (although, in principle, if there is Teleport, you may not even need a mass spell - there are not that many powerful units in Necropolis anyway); dispel spells; use Tactics, etc.