I think the colors are too busy fighting with each other, I don't care for it at all. I love the Tsav, and would love to see yellow or blue around it. Maybe pastel nlue like a nice aqua.
Beautiful colors no doubt, they pretty much look like rubies with a super high clarity emerald... however I think they are BETTER being that they are spinels and a Tsavorite. As far as whether they belong together, why not? I think that vivid eye catching stones like those would make a splendid 3 stone, certainly something that people will remember (I know I would!)