Ok I joke about destiel getting together right off the bat in s16 but honestly
Draw it out. Make it tense, make me think you aren't going to do it but at the same time amp up the pining 1000%.
Have moments where they get really intense with the eye contact, the lip looking, all the things unsaid are right on the surface ready to bubble over. They wanna address the elephant in the room SO damn bad but they're too busy and the stakes are too high and maybe Cas thinks Dean is rejecting him and they're both so mad about it all but they keep getting SO CLOSE to breaking that dam but what'd'ya know? Interrupting moose. I'm talking they almost kiss, breathing each other's air, 16 years of yearning buzzing between them. Burn me SLOWLY. Hurt me with it.
Then, and I can not stress this enough, give this God forsaken (literally) ship the explosive conclusion it absolutely deserves.
