I think forg bows should be allowed or birds have no chance. Mage has no chance with any weap at 10.
What if.. Bears lvl 10, birds lvl 11, mages lvl 12..?
Or just a regular single elimination all lvl 10 but I'm pretty sure bears will dominate.
Although I haven't tried chunker on ten bird yet..
As far as founders if your opponent has one or doesn't mind.. wear it! thats just my opinion