get some reads on what each player is calling down with postflop. and how many streets. what do they do with draws? weak pairs? nut hands? etc. once you have this kind of information you can reaaaaaaaaaally start opening up and punishing them. isolate them and play as many pots in position as you can. look to steal pots from them with cbets and turn cbets because their ranges are so wide/weak. also, with appropriate reads you can start value betting them far more liberally and take advantage of them being calling stations.

if LOTS of pots are going multiway to the flop then your money is going to be coming more from flopping well and getting value (moreso than isoing a weak fish and stealing a pot from him with a cbet) so it would probably be good to tighten up a bit and look to play a stronger range, in position if possible, and just value bet like crazy. it doesn't matter if you iso QJ and get to A76 flop 4-handed. you're not trying to win every pot. you're trying to maximise your value when you can get some. it's perfectly fine to check/fold QJ on A76 when you are 4-handed to the flop on a table of calling stations.