Liches are definitely scary :) but vampires are scarier))) What annoys me the most is that everyone starts attacking them :( Well, to be honest, I'll tell you a secret. It's harder to play as a Necromancer :) it's easier to win as a Mage. ;)
In the original game, it's also easy to hit and run; there's nothing new about this tactic, only in the game, there's more opportunity to use it more widely. We level up several Chaos Mages on stones and platforms, use them to gather resources and clear out neutral creatures or dungeons, and as a result, a brigade of potential destroyers is ready - we pick off the enemy's main hero, cast a couple of spells, and retreat, and then we pick off heroes in the tavern and attack again. The effectiveness is approximately 60-80%; often, such a tactic is tried to be limited or prohibited.