The most useful monster.

Yeah... I think all UNITS are useful in one way or another, and the developers thought everything through in the game: My thoughts:
For example
First-level units are needed to steal everything everywhere; basically, they help manage the house and provide amenities for a large family....
Second-level units also suggest that you're a homebody... but still love to fight someone—meaning you can already actually fight and earn your first LVLs....
Third and fourth-level units raise your lvl to the peak while you walk alone and crush all the bad inhabitants of the Heros world....:)
Notice that absolutely all units have their own little tricks, and that's where the beauty of the game lies, and therefore every unit is the most necessary unit ..... ... and there's no even need to argue about this!!!!!