The best at dealing damage is a full dex bird

The best at tanking and crowd control is str/dex bear with just enough dex to have the bear have 100% hit so his key moves work

The best at aoe damage is a full int mage

The best at dot is a full dex fox

The best at team support is a 50/50 int/str rhyno

Anything other then this can work but not to the effectiveness of what I stated above. Most just splash str for survivability but sacrafice the effectiveness of there main role. Hope this helped.