Sounds like calling station fish, so play simple ABC poker.
My advice in this scenario:
You should only be raising premium
hands from early position. And from early position you should be coming in for a BIG raise. This will limit the amount of callers and build a big pot with your big starting hands when called. Dont worry about seeming too obviously strong since the players have shown they arent respecting raises.
If there are a lot of multiway limped pots then limp in with your suited connectors and smaller pairs to try and hit a hand and cash in against the fish.
If its folded to you in middle or late position you do not have to raise as large since there are less players to go through and you may get position against the blinds.
Middle and late position kind of depends on your comfort level with putting in raises with weaker holdings to play hands in position against bad players. If stacks are deep you can loosen up in later positions if you feel you are a much better post flop player.
If its a fast playing tournament and stacks are short then its important to know which players will raise-fold to shoves, limp-fold to raises etc.
Writing this quick, hope it helps a little!