I'm speaking for the clone but there's definitely S1 phenos capable of hitting the yield. There's one that looks more indica dominant that I think might out yield the clone but wasn't as good.
I'd want to be running hydro but if I was going with soilless I would go with fast draining 50/50 mix of peat and growstones (they're like better hydroton). I'd put rooted clones into 1qt pots lined with something like microkote or spinout (or just mix copper (II) hydroxide n latex pain and make your own, all pots will be lined with this) and let them stay in there for about 3 weeks to get a truly dense root ball, you could probably do it at 2 weeks. Then go to 1-1.5 gal for another 2-3 weeks, then to a 3-4 gal, then two final container about a week before flower. They can be held pretty much indefinitely in the 3 gals if you need to wait for room to be opening up in bloom for the new plants.
For nutes I'd go with Either Jack's Citrus FeED or Dyna Gro's Foliage Pro as my base along with DG's Protekt. After the stretch give a bump in Ca and Mg and S (usually Mg supplements have a lot of S). Feed enough to keep the leaves green and productive but no more and feed at every watering. Plants are not like people, feeding them too much will not make them fat. Flush your medium out with 2-3x the volume of the pot of pH'd water and then feed as normal every 7-14 days. Salt build up will fuck your plants up.
The big trick is getting your tent filled with an evenly illuminated canopy and finding the environment the plants like. I find running negative pressure fucks things up. Make sure your intake can keep up with your exhaust.
Do you have a light mover in there? They help provide more even coverage. They don't really expand the area a light can cover but they help them cover it better.
One day I want to try to get a pound off a single plant under a 400W with the clone when I have space. I think she could do it.