Someone said fatter was better, i wanted to test that (317 tons, 20 rapier engines): Ended with approximatively the same fuel ratio than my lighter SSTOs, but with apparently much more delta-V. So an actual "solution" to the problem would be to have a giganormous craft, and a tinier craft in it, and actually bring the large craft to orbit, then departure from it with the smaller one with full tanks, doing whatever you have to do in space, then get the tiny craft back in the big one and land the big one.