[PvK]

* Try playing with slow research, so magic takes longer to get very powerful.

* Try bringing enough priests with your armies so that people using those undead summons you mentioned, get banished to bits.

* If there were an increased penalty for being attacked by many foes, I would not make it a fatigue penalty, and perhaps not an increased defense penalty, but perhaps instead an offense penalty. A skilled defender could then still have some chance of staying alive for a while, but would have a harder time killing enemies while fighting several at once. It would also increase the value of high attack skill.

PvK