fully agree
prefer to 3b pre.
definitely bigger turn raise if you are going to raise, he has loads of hands that will continue. Bigger turn bet also sets up bigger river bet.
river blocking spades sucks, we block most of his missed FDs. folding this size seems fine, or we can b/f to try to get some value from KQ KJ AK. Once he bets big he shouldn't have Tx without a boat so we don't beat any value for this sizing, I doubt he is doing this with AA or KJ.

What other hands do you take this x/c x/r line with, I think it's really hard to construct a balanced range to do this with on this board. The problem is that he has all 16 combos of AQ and 9 sets and we should have way less of these, so if we x/r turn with anything other than AQ he can jam over and we hate life. J9 is much more dangerous to slowplay flop, and we probably raise some AQ on flop, so they have a big range advantage on the turn. I don't like to x/r 2 pair, and if we don't have 2 pair then we have no boats on the river to call with.

I quite like planning to x/c x/c x/r this combo, it protects our one pair hands that want to call down and see showdown. If spades miss it looks like a desperation bluff and he has proportionally more value. We would likely x/c not x/r board pair rivers.