There are plenty of 'uber-strategies.'
Hypnosis + Sacrifice
Phantom + Kamikaze
High Intellect + Fire Rain
Armageddon
The list goes on. This game is very, very easy on Medium, moderately challenging on Hard, and challenging on Impossible. If you find it too easy, see if it works on Impossible.
BTW this is why we need multiplayer, so that we can test these strategies on each other.
