Regarding sets on drawy boards. In general, most draws will be cbetting the flop. Say you raise preflop with ATh and the flop comes Q52 with 2 hearts and your opponent checks to you. You're betting most of the time right? Same with them. Basically on drawy flops most opponents will bet their draws. This allows you to get some more dead money in the pot as well as cut down on their implied odds
Now obviously people don't ALWAYS bet their draws, so if they checked behind and the 3rd heart comes you don't want to go crazy, but most likely a draw like that is semi-bluffing boards like that. So checking actually gives you 2 advantages in that it traps draws and denies them the extra card cheap (even a 3/4 pot bet is relatively small if it's a limped or just raised pot preflop. Re-raising a 3/4 pot bet is a lot more). On top of that (this is only hands you're stacking like sets), your opponent will always want to stack his big hands on the flop, so checking doesn't lose value from opponents. Here are the possibilities imo for a drawy flop like that:
air - may cbet if we check, fold to C/R. If they check behind will most likely fold to turn bet no matter what comes. Advantage: C/R
draw - will almost always semi-bluff where we get to bloat pot with what we are pretty sure is the best hand. Advantage: C/R
draw pt. 2 - they MAY check behind with their big draws. This gets them less from our top-pair type hands when we have them because we'll play pot control and their bet they get out of us will be smaller because of the nature of bet sizes (exponential). In this instance the advantage is for leading, but overall if we check our monsters and top pair type hands opponents won't be able to extract much value when they hit if they're checking their draws back.
Monster - stacking regardless, will always bet when last to act because of drawy board, we stack them no matter what we do here. No advantage.
As you can see all the possibilities they could have C/R is basically the better line unless they are checking back draws. If they are checking back draws they are going to have trouble extracting value when they hit against a lot of our range. This is why with monsters like that I like the C/R when we are oop and villain was the one to raise preflop.