Tracer genji synergy tips

I’m a masters tracer main and I’m trying to duo with my homie who’s a genji main but we have the worst synergy known to man. We’re almost never diving the same person and even when we call out the person we end up diving at different times and either barely securing the kill or getting forced out. I already know the basics for tracer and I’m sure my friend knows how to play genji pretty well I’m just looking for tips on how to synergize as a duo better.

TLDR: what’s the method for duo synergy.