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the liquidity alone for stETH & wstETH makes it a very strong contender. My suggestion would always be towards the more liquid option. Some farming op on this also.
e.g. Balancer.fi has a wstETH-ETH pool which yields 5% also in LDO and BAL awards.
For the question, I would suggest keep it at current 25% max as given in governance. Put 12.5% into stETH, put 12.5% into wsteth, then add ETH to this and LP wstETH-ETH pool in Balancer.
Rocket can remain 25% max. Keep 25% liquid in treasury as regular ETH.