It's best to take a relaxed approach; without explicitly suggesting an alliance, start by talking about general strategies or exchanging game-related insights. This first exchanbet aapge can help build rapport and determine how interested they are in working together. You can progressively present the idea of collaborating more closely if they react favorably. Reiterating the advantages of a partnership is another successful tactic. Stress how working together can improve the odds of both players winning and make the game more fun.