I vote for alUSD/ETH pool. IMO later on if people will want to swap anyERC20 token <> alUSD there will be a need for lower fees when doing such trades and provide a lot of exchanges (alUSD -> ETH -> anyERC20) in the middle of the trade. I understand that ETH token is the most liquid pair for many erc20 tokens on Sushi so making the stable and deep liquidity for pair alUSD/ETH will then decrease the problems of going from alUSD to anyERC20.
