opener was a fish and first flatter is a reg, recently he had a weird line with TT vs me earlier this session, flatted pre and flop, raise my 2/3 turn bet on a board of 6s5d8s8c  and jammed the river K.  

4bettor is only a reg, but seem to be one of the nitter reg, but seem kind of aggro postflop. running 20/12 with 6% 3bet, so far no cold 4b in 13 chances.

his 4b sizing is kind of lol 4 way and we were deep.  

Flop I think it's a easy bet once he checked, could checked by for pot control as we have the Js if we were HU but three I think we must bet. I made a mistake by betting too small, should be around 60-80. Not really worried about the btn as he shouldn't have 33/77 (maybe 77 but still that would be a optimistic peel by him when calling the $14), and BB's cold 4b just never have those pp.   

and he raises to a lol size oop,  and I think we have to call, don't really have a 3betting range here since we got so much behind. (maybe T7s for protection)

Turn he quickly checks and confuses me even more, what hand would he c/r 3 way in a 4bet pot and check turn.  If I have a flush, I would be be calling his turnbet, if I have a set, I also be calling his turn bet.  and stack size is bit weird for any sizing too, so we checked back hoping for a showdown

River is pretty blankish.and he tank for about 10s before betting 40% of the pot.  we don't block any of his nut flushes that could have went for a light 4b(AQs,KQs), hence having QQ here with Qs would convince me towards calling.  This would still be a weird way to play AA/KK

and how would we play our TT/77/33?