Sylvan vs. Necropolis

So, Dire is taking two types of magic, both of which are not very effective against Necropolis, just to make life (death) a little more difficult for his hero? And who will fight his army, which is twice the size of yours? Pushkin?
I should note that I see light as more promising in this case; it clearly works no worse against darkness than darkness itself, especially with Eternal Light. And in summoning Necromancers, he will always be ahead of us, no matter what we do. He doesn't need druids for spellcasting, and his wasp swarm and hive will work perfectly well, as will his phoenix with elementals, which will clearly take down more percentage of elves per hit than our phoenix will take down of him.
If I'm wrong about anything, please correct me.