Which faction do you like the most?

Yes, all level 1 units are good. :) Imps, by the way, drain so much mana from the enemy hero that they are left with almost nothing to cast spells. Although, of course, nothing compares to the absolutely amazing ability of the Gremlins =) A couple of hundred Golems + half a thousand Gremlins, and that's it, the enemy is doomed =)