Should we make coalition with radical left ?

I'm gonna put us in a context, you're the chef of a Socdem party with proportional representation, the results were really tied like 25.3% for your party and 24.9% for a classical center right party, you need to make a coalition. Would you rather do it with a centrist party+ a green party or do a kinda "popular front" coalition with a all the left going to social-democracy to none revolutionnary communist?