I like Heaney a lot, but I don't know that I'd give up one of the 4 for him. And if I AM giving up one of the 4, I'd say Soler is the one I personally would part ways with first. Miami may like him because of his Cuban ties, but he also has a guaranteed contract which means they may not like him as a target, either. Who knows, but I would suspect the prospect coming back would be Heaney. He was ranked #43 overall before this season then put up a 1.60 ERA in 18 starts across two levels (A+ and AA) with a 89:26 K:BB ratio in 95.1 innings. I have to imagine he'll be ranked somewhere right around where Soler would be ranked. I know rankings don't determine true value, but if they're doing a one-for-one swap, that's what I think is the most logical one. At this point I don't see any reason to swap the other 3 unless you're getting an MLB superstar back on the other end.