Playing this game made me want to return to Touhou, that was a big mistake on my part, now these kind of games are too easy, and Touhou is so hard *cries*
I'd really like this game to pause if I click off it. I like to chat on msn, and facebook while I play flash games. It annoys me to come back from typing to my friend to see my minions all dying because I haven't been there to cast spells.
For Necromancers go pure Will and Int. Letting your minions do all the work is totally worth doing, combine it with Charm and you've got yourself a little army going, with your original Undead minions to keep others from turning back and killing you. Also adding someting like Ignite or Bolt is great. This build only really works if you want to do magic though.