Is it possible to send POS blocks to a different address so it does not impact coin age of main address?
No, it's not.
First off the address is irrelevant, it's the block and the coin age.
Secondly, I think you misunderstand the Proof of Stake mechanism.
This is mining. Just as if you were pointing an ASIC device at a pool, except that the ASIC in this case is the coin block itself. It is part of the calculation, and it has to combine with the newly minted blocks in order for the stake to work and move the network.
It is possible to lock some coins out of the equation, if you need them to be free to spend, but once they are released to stake, they will do their job and become ineligible for stake for the maturity period. For this coin, that's rather short. My other main coin is TEK, where you wait 30 days. There's a lot in between, but right now the only others I recommend are HBN, which is a damn fine coin, and FIRE, which is backed by a man I trust and has recovered pretty nicely since he took over.
POS coins are my primary focus, but I'm far from a comprehensive expert, so take my recommendations with a grain of salt. I hope this helps
You are correct I don't know much about POS, just trying to understand it currently. Are there any guides on maximizing staking efficiency?
The coin age is the age of an incoming transaction, which is tied to one or another address (in your wallet it looks like this address has some amount of money; this amount consists of a sum of all incoming transactions to this address). A transaction, or in other words, a block can't be moved (even split, because it will cause a transaction to yourself) without the age lost, because it will become a new incoming transaction with a new timestamp.
To maximize staking efficiency you just need to run your wallet as long as you can, ideally 24/7, and make bigger blocks, up to 4000.
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