Issues with the map that i see are: Skarn and Hyral have no big city with army cap near them, closest big city is blackmore which requires castle 16 and has army cap, yellows land benefits them too much as their land pushes downwards and is far to reach and near impossible to capture unless they give up
My sollution: switch ishnars buff with blackmores, add another kingdom between yellow and purple or fix the land so its not extremely far
Make it so the orcs that yellows and athaly acquire at early levels at each kingdom as only one kingdom having it is a big advantage which is why athaly or neferek usually dominate early server
giant city kirinhal close to neferek and athaly and has army cap
Other giant cities should have army cap as well
Its minor things like these that can affect kingdoms throughout
Like yellow and purple have multiple big cities right near them which makes it hard for skarn and hyral to contest for them as only nearby big cities is ishnar and blackmore
Add some more big cities in the areas nearby
(Yes, i am a hyral player on two servers but i also play as neferek and athaly on other servers so im aware of how big the advantages really are)