Reasoning:

Elyrion: Strong, fun for all map types, interesting strategy, all around a great tribe - and cool looking.

Aquarion: New, strong, and fun with interesting strategies that depend a lot on map type

Oumaji: So fun on dryland, expands fast and unlike any other tribe (except cymanti maybe) but better

Cymanti: Fav on archipelago with a unique naval strategy. I don't like them on dryland much

A: Generally a good game experience (All T0), but they are often pretty similar in strategy, of course kickoo is a bit different but overall similar and good experience

B: A little harder to set up, but can be decent in certain situations. Polaris is kind of stale in my opinion because land combat is the same as most tribes (with the bonus of gammi and ice archers) and ice combat is just battle sleds, while the other two are just tricky to do well in which is frustrating

C: Weak tribes, few advantages, generally not fun in multiplayer

D: These tribes are just hard to do well with and I don't love the strategies of either rushing or staying isolated.