for a 2/3 size ( what is not optimal ) solver checks 90 % on that flop HU MP vs BTN
that means to me 3 way it is Pretty much a range check
65dd is Pretty much Always checked. it prefers betting some 65 (None Diamond)
so what are you doing when you bet AhAc , BTN calls, the turn is a Diamond , 5 , 6 , 8 , T , J ? same Problem. but pot is bigger.
anyhow … i am not trying to sell you anything. you can bet whatever makes you feel good