you should always avoid the bluff against this type of player, because of course, the chances of them paying and you being caught are enormous. If the miracle of one of them raises, you will certainly have a very strong hand. The best thing to do is to fold.
To win a game against a Loose / Passive, you should avoid high post flop betting, trying to keep you in the game as long as possible, but without checking. Place standard bets - by value - so he can refill the pot in all rounds.