no one else seems to be biting so I'll offer some random thoughts although i dont know the right answer.
- it depends what type of fish it is. PLO fish are far more extreme than NL fish. While in NL it tends to almost all be passive stations, lots of PLO's greatest fish are ridic spewtards who are 3bet happy in all the wrong spots (hello JorgeArias
http://www.pokertableratings.com/stars-player-search/jorgearias).
-OOP with spewtards you just have to play good hands, nothing else to it or you will just leak money left and right. Overcalling AAxx, KKxx, AKxx is a pretty good idea when someone rasies and the bad player is in the bliinds as they will 3bet a lot and will make a lot of poor decisions with dominated type hands when it gets back to you and you stick in the 4-ball. If you 3bet right away they will simply fold the hand that they otherwise might 3bet.
-OOP with passive stations (in a vacume) then you don't necessarily need to play tighter but it is important to adapt your opening ranges. Work out if they are trappy fit or fold players or if they are 'ill never let go of top pair' players. You should be opening different ranges vs. each of them.
Vs fit or fold guy we want more drawing hands that we can barrel with equity and get him off top pair/2 pair etc. Its less valuable playing a big ace type hand oop with this guy as we are unlikely to ever get paid off 3 streets with a big two pair or similar(if he pays the 3rd street we are probably beat). Obviously we will play strong big card hands but in general we will make money from this guy by getting him to fold!
Vs 'ill never let go of top pair' type guys then you should be eliminating smaller drawing hands from ur range as we have zeroy fold equity with this player and the hand is weak on it own merits. Now however we can open weaker stuff like AK97r AQ45r for value in certain spots (say blind on blind or when remaining players are tight and its likely we will isolate). We can open more or this stuff as we know this guy is unlikely to get away from Ace, King or Queen high flop when he is dominated and we can get a lot more value from our hand than we should usually be able to.
(vs fit or fold we want more equity ridden barreling hands, vs station we want more thin value hands)
-when you sit in a game and the fish only has 2 seats to his right ask yourself "whats the likelyhood the other remaining seat will be filled by a) very strong reg b) average-weaker reg c) another fish?" Clearly in cases a) and c) we want to leave the seat to our right free. In case b) it might be worth sitting one seat removed from the fish as this gives us the most chances to play in position vs. them.
-try and re-exploit regs who are opening up their game in an effort to play with the fish (in the same way you felt they are putting pressure on you sometimes).
-if a particularly strong reg is picking up that he can exploit you on the button then the game is probably not worth playing. Its far better to find a game with 5 weaker, auto piloting regs than to play a game where you may be getting exploited more than its possible for you to exploit a random fish.
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