It could be a sign that an opponent is attempting to create low-value sets or sequences if, for example, they routinely discard high-value cards. Using your hand effectively is anotherrummy joy apk successful tactic. Players should keep track of possible melds that could be created from discarded cards while attempting to form sets & sequences as fast as they can. Knowing when to strategically use wild cards can help you finish your sets or sequences faster than your opponents, which is another way that using them effectively can turn the tide in your favor.