I had 2 water and a shadow, and i beat them. You can incrementally hurt the castles as get the big guys coming at you one at a time as well. I accidentally did this the first time.
Best units: whirler for dark elves, any lance horseman from any faction, halberders for any faction (undead!)
IMO dark elves best faction because of whirlers and halberdiers on same side.
You can pretty much just spawn halberdiers and win game. shooting units are underpowered :(
Note: this game is RIGGED. The % doesnt mean anything. i miss 3 95% attacks in a row while i get stunned 5 times in a row by a 30% chance attack? Thats BS. thats 0.00125% and 2% chance respectively. Maybe if they didnt rigg the statistics this game would be better. Im no longer playin this game because of this.