Dr Ergo - Hriger? 2 Rounds play isn't that useful at all, for 1 damage extra and a more useful all round ability, he's worth it.
Numar/Eddie - Eugene + Fanny - Nanook?
4 4* is sort of a weird combo, I like it but trading in some more solidity and a type of DR will help you on weaker hands.
I like using Noland as the 4* Watu, not as useful as Eddie, but it depends on the rest of your deck. Dave + Eugene + Eddie is a killer hand though!