It's a K high flop in a 3b pot BTN v CO.
If I'm BTN I'm going to have every AK, and KQ combo. Every AA, KK also, some suited K's and some suited 7x. These hands are effectively the nuts and want to stack off hands on most run outs.
Those hands are going to be about 40% of my range. So I need a lot of bluffs.
What hands make not so great bluffs? Hands like 99-QQ. So that only leaves about 40% left. That's not enough. So not only are u going to have to bet your good ace highs, you're going to have to bet a good portion of your 99 to QQ.
I just ran this on a solver and got 91.2% cbet. (My trees might not be perfect, but good enough imo). Cbetting 100% is a far better option than not cbetting hands like A6s here.
fwiw my cbet in the last 100k hands or so is a little over 40%, but in these types of situations doing anything less than mashing cbet with all but the best showdown hands that can't valuebet is going to be a big mistake. Not cbetting 99 - QQ enough is going to be a leak most people have here. If you're not betting hands like A6s, villains will be able to print money folding everything but tripps and will never have to pay you off. This is not a small leak.