but really of the various pools how many of them actually need liquidity?
This is exactly the point.
None of the kingdoms benefit the network.
They are all bleeding coins.
The only pools that need yield are pCUB/ETH, pCUB/USDC, and pLEO/MATIC.
Even the pLEO/MATIC pool is only for the bridge.
It is a huge cost and may or may not be worth it (probably worth it).
Then again why isn't the pLEO/MATIC pool paid in pLEO?