3b depends on CO aa** freq, because:
Interesting thing about double paired suited kings is they always have pretty much at least 10/100 and avg 14/100 in HU/ 3 way/ 4way pot, so juicing the pot is always good unless that edge is magnified or greater by implied odds because everyone is super spewy postflop but that is dumb hypothetical...
but heads up pot against CO 5baa** you are like -14/100
but then you have huge edge when isolation is achieved
so yeah 3b is standard
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Flop is shove, but it is close, if peoples stacks were more equal to yours then I would muck, we would win the pot ~ outright 1/5 times
(sim) at default
I coulda just put +1