As a follow up here's a conservative combo count of where my head is at on this.
8 value combos that we are loosing to, and I'm being liberal here as many players don't open KJdd UTG+1 for example (and we mostly still have a few outs):
3 combos of 88, 1 combo of QQ, 1 combo of TT, 1 combo of AKdd, 1 combo of AJdd, 1 combo of KJdd. And again, why would anyone bet 3/4 pot on the turn with the nut flush? But let's put all these in for arguments sake.
AT LEAST 12 combos of
hands we are ahead of:
3 combos of AdAx (maybe all 6 combos but we will be conservative), 3 combos of KdKx, 4 combos of AdKx, 4 combos of AxKd, 2 combos of AdQx.
This seems pretty worst case scenario where he has no crazy bluffs and overplays the nuts a lot we are only behind 8 out of 20 times here. Depending on the player we could eliminate some of the nut flushes from Vs range and add some hands like KdQx, KdJx, etc...