The natives in Level Two move and fight like Speartons. You see how every time one gets killed the feather on his head blows off his head in a loop? Well, that's the same as Speartons. The Speartons' helmet falls off in a loop.
The natives in Level Ten have a giant with them, so you'll need to get a lot of Swordwrath to defeat it. But you should get some Speartons to defeat wave after wave of natives with clubs (or if it is on Hard mode, they have small swords, and if you are playing Insane mode, they are actually Swordwrath.)