Occasionally playing online I will run into a 100% pure calling station. This is not your standard calling station. This person never never never raises. If this person bets it is only a minbet. This person will call any standard flop bet with the nuts, set, 2 pair, top pair, middle pair, flush draws, straight draws, occasionally air. Never raises.

Against typical calling stations you valuebet your good hands and dont bother bluffing, but typical calling stations will eventually raise their strong holdings alerting you to danger. Playing against a 100% pure calling station you get no information at all postflop since they take the same minbet/call or call line with almost every holding.

I do consistently beat these players but I feel I could do alot better. I will bet pot into them on the flop with TPTK, get a call, and have no clue what to do on the turn. Since they could have anything from garbage to the nuts.

What is the optimal strategy against these opponents?
Valuebet monsters, smallball medium holdings?
If I end up playing alot of smallball am I losing value?

I feel like im playing devoid of information and have alot of trouble with decision-making in hands versus these opponents.
Help?