Sup Angel, do you ever not run deep?
Pedantic, point, pretty sure we see a mono board (13/50)*(12/49)*(11/48)=1.5% if we don't hold any of that suit, if we block one suit it's (12/50)*(11/49)*(10/48)=1.1%, and we flop a flush with suited cards (11/50)*(10/49)*(9/48)=.8%.
So not often, but in your case you can prob expect ~4-5 mono boards per event
Flop sizing is about 271% too big.
Think as a general principle mono boards, at least in spots like BTNvBB where ranges are wide and one range is basically a capped subset of the other, are conducive to being cbet for 1bb. The idea being, most of V's range is handcuffed since most of his range contains no spade and hence will have trouble continuing even for minsizing.
You already have a range advantage, his range essentially being a capped subset of your range, so you wanna be cbetting often but most of your range also has no spade, it's just a combinatoric fact. Spades are only a quarter of the
Your hands with a spade wanna go small because they block the hands V will continue with (so bluffs wanna go smaller because they can and value, namely big spades and flopped flushes, also wanna go smaller because those really heavily block V's continue range).
So bluffs wanna go tiny, and value wants to go tiny, and that leaves basically nothing else in your range that also doesn't wanna go tiny.
AP his x/r seems OK as a low freq play since you should have some hands which'll fold, but it's not great by any means.
AP pure flatting the x/r because his x/r range should be mostly flushes and he has a ton of them; you're not guaranteed to get it in good by any means so you really need to let V blast off with what few bluffs his range can contain. Furthermore, you will have a hard time balancing your jammed flushes with bluffs if you do jam. This is likely fine exploitatively though, if you wanna go down that path and be wildly unbalanced because V is fishy and'll pay you off anyway.
Jamming with this hand for equity denial is extremely mubsy and a huge deviation from the very poorly-represented equilibrium strategy (your range at this point should have like 28 combos because 1bb is so heavily preferred at equilibrium)