I don't even see this happening. They're both goal scorers and will have to share the chances, can't see it going well with their personalities. Also the amount of chances Suarez fucks up and his passing and link up play is diabolical now. Higuain is genuinely better at that part of the game.
Despite to what people believe, Ronaldo can cope just fine with another goalscorer in the team(though he doesnt share penalties).
Benzemas best goalscoring seasons were with Ronaldo in the team, despite people claiming he reached a new level when Ronaldo left, which he didnt.
I reckon both will get some goals, but i believe it would be a partnership with glaring flaws, will go no where in the CL.