From what I gather, fully levelling your kingdoms doubles your Tribute chance to 20% and triples your actual Tribute reward from those kingdoms. And yet people report that they see a REDUCTION in the amount of gold they get from Tributes (or is it from PvP?) while at the same time, the game difficulty has increased?
Yes that part's interesting. I recently made traited Gorgotha mythic, and was surprised that my defend team score didn't increase at all. Of course, Gorgotha isn't in any of my team slots and I haven't used him much.
I also wish the difficulty ramping were spelt out a little more clearly. Really not interested in running into the end-gamer's current dilemma of playing the same opponents over and over again ad nauseum.
In my case there appeared to be a definite uptick in difficulty that occurred around level 290, and another one around 400. Still, I can't discount that the constant in-game updates may have coincidentally tweaked AI behaviour around the same timeframe.