From Longman Dictionary of Contemporary Englishwinning combinationwinning combinationSUCCESSFULa mixture of different people or things that work successfully together → combination
Examples from the Corpus
winning combination• As for Batty's return, I'd say if all the team are playing well then don't change a winning combination.• Needless to say, it was a winning combination.• A husband-and-wife gold medal-winning combination at the same Olympiad-now that is unique. 