In the GPF so far, there have been a few cases where the SP combination jump didn't work out; Shcherbakova, Miyahara, Chen come to mind. Two of them had already done a solo jump and were thus screwed, essentially being a jump short. Is it worth doing the combination last, if just for the 10% bonus? 10% on a lutz combo is 1.02-1.08 BV. 10% on a solo flip is 0.53 BV. The difference is 0.49-0.55 BV. Missing a whole 3T or 3Lo is 4.3-4.9 BV. I don't think it's worth it, personally, especially with quads; who would have a 90% success rate with any given quad, besides maybe Hanyu when fit?