Tactics for playing against a Necromancer.

Hmm... Then let's do it step by step. Suggest your version of a Warlock hero with a level 15-16 build, so that he would be a rusher...

Well, let's say we take Sinister. At level 16, he has masterful, irresistible magic, Initial Education - Magic Attraction, permanent luck - Lucky Wizard, Masterful Chaos - Master of Cold, Lightning, or Fire (depending on what's available in the guild). You can first clear out the troops with Trickster, and then gather all the main forces and finish off the Necromancer. (I confess, I actually prefer Necromancers):(