Rockrazor is the best of all the semislicks I’ve tried, so it’d be more or less about finding the right carcass for you.
For me, that’s the previous version of the Supergravity, which is one of the best tyres I’ve ever used full stop. But for me there’s not a tyre in the current range that ticks the same boxes, I had puncture issues with supertrail, it’s nothing like as tough for me (good sidewalls, weak middle), and the new supergravity is a fair bit chunkier than the old. So if I had to choose a tyre from teh current range I’d have to go supergravity and just deal with the extra weight, I still think it’d be a better compromise than other options, because the rockrazor’s just that damn good.
But as it is, the old version is a perfect goldilocks tyre for me- sensible weight, more than tough enough, so I have 2 in a box :)