Armor: If you are planning on buying DeathKnight, skip Dragon. If not, Dragon Armor is your first priority.
Chests: If you are willing to wait for Events (especially new Kingdoms), save for Event Keys. If you need lots of Ultra Rare+ Troops still, Gem Keys aren’t bad.
Resources: Bad Rate of Return, don’t waste Gems on these
i 2nd this, still takes fucking AGES to lvl kingdoms… i only have all magic kingdoms lvl 10 and 2 armor kingdoms lvl 10 so far and that in like 2 years of playing zzz… atleast dragon armor speeds things up a little. i get to lvl a kingdom to lvl 10 once every two weeks now if im lucky and have been playing enough.