They might modify their gameplay if they witness you using a joker to finish a meld. Consequently, even though jokers are effective tools in rummy, you shoug rummyld use them carefully, taking into account the dynamics of the game as a whole as well as your hand. The ability to monitor your opponents' moves during the game is one of the most important Rummy skills. As well as their general gameplay patterns, this entails closely observing the cards they draw and discard.