UTG is playing 27/20/6 over 1.8k hands (12% raise first UTG) and the button 52/16/4 over 80 hands

I want to break down my hand a little bit before continuing on the hand (trying to fine tune my pre-flop hand selection as I'm finding that a small mistake pre-flop can lead to big mistakes on later streets):

We're are out of position multiway and the pot size is relatively small to stacks as we are about 100bb deep; so this is not very advantageous for us (i.e. deeper we are the more value players in position have).
Our hand contains a nut flush draw holding, which is very good news for "coolering" people and being able to play draws aggressively post-flop, however the 4 cards as a whole don't work amazingly well together - A458, there are some straight draws but not very well connected as the gaps in the hand are both 2 cards, and they are not very high (ideally we want to have a higher straight or straight draw than someone else right?)
Our immediate odds pre-flop are very good (but this will be the same for any 4 cards though) and we close the action

So in my eyes just about strong enough to defend - what do other people think?

What do other people also think about defending with hands that are almost naked nut flush draws (e.g. Ah8hQx4x) in this spot?

I like leading for value mainly and because I believe that the flop is connected enough for at least one player to continue - if I check I'm worried that both players may check behind (the button is a very loose passive player and with that in mind it's not the best flop for the 12% UTG raiser to C bet multiway, his C bet % is 60) and if this happens I miss an opportunity to start building a pot vs weaker draws.
Pretty easy jam if someone raises my lead.

I was unsure what to do on this turn, I felt my hand was strong enough to continue betting / get it in. I don't feel that there will be many KK combos (maybe like KKxx if with the King high FD), or K7xx combos, and seeing as I would expect a set to raise the flop, I actually thought I had some fold equity on the turn...maybe I am delusional ?:)
A check-jam line works a lot nicer for my stack size if I want some fold equity but I thought they would both just check behind as the King rarely helps either of them and is hard for them to represent imo, and it can't be that bad to continue building a pot with so many draws.
Once the UTG player clicks back the flop and the button calls...I think the UTG has a combo like the fore-mention KKxx and the button a weaker version of my draw/s.

Although now I think about it in slow time, I'd actually expect UTG to just jam with KKxx and the K high flush draw...

Anyway here is my main question about the hand and the concept I am struggling with: am I better off getting it in now with my monster draw on the turn, or flatting and seeing if I hit because I only actually have ace high and can be pretty confident that I have no fold equity if I do jam, but still confident I will get paid if I hit the river ?

When the action came back round to me I had 134 behind, there was 274 in the middle and it was 43 more for me to call...so my jam would be an additional 91 into a total pot of 408 (317+91) for the remaining 2 players - obviously the button's odds will be even better if UTG calls. They had 100 and 81 behind at this point.

On the turn I had 53%, UTG 17%, button 31%...so I'm pretty bitter really that I didn't get it in and made a misread on UTG's range, although I did only have ace high and no fold equity? - hence why I'm dizzy