Actually in 4-3-3, ramires work perfectly. Because in midfield you need one passer, one runner (Ramires), and one defensive mid. In 4-2-3-1, ramires cannot play in midfielder, he is more suited playing on the wing and should be used if we have to face a team like Real madrid/MU who has great winger. I don't think hazard/marin/mata can help our full back to defend against CR and chased down marcelo.