Discussion of level 1 monsters.

I like these 6 units the most:
Centaur - the best combination of melee and ranged combat for level 1.
Berserker - a real madman! :)
Squire - one strike and you're guaranteed a headache.
Rogue - invisible on the map and good for scouting. In battle, he's just average.
Imp - a mana thief. Good against other mages.
Wolf - two attacks can be fatal for many.