I can't answer the question directly but I'm also looking for the best light wind foiling combo/s at the moment. I've traded a bunch of 2nd hand cheapies trying to find what works for me.
I have a mono 9 which nearly covers everything, great kite, keep coming back to it. It's my go to in tricky conditions. Makes loads of power and great initial pop on first loop to get you out of the water. I'm 95kgs need the power. Also a gust muncher.
However when it's too light the mono falls out the sky and won't get me going.
So I bought a trip 12. Nice and light for size, generally won't fall out the sky. Only added a knot or so bottom end over the mono because it doesn't have the same sharp hit of power in the loop.
I tried a peak 8m. Wouldn't get me going when the trip wouldn't either. Lighter in the sky but disappointingly way slower than my peak 4 5m.
I bought a cloud 12. Even lighter than trip, turns faster than trip, doesn't make more power though. Never fallen out the sky although sometimes it still won't get me going.
I bought a chrono 12. Flies in very light wind. Slow as a wet week to turn and accelerate but it will make bags of power when it's too light for an inflatable. It does the job but I'm looking for a faster alternative, slow kites aren't my favourite.
Would I buy a mono 11 for foiling? Personally, No, because if the mono 9 (or other 9 inflato) couldn't make enough power then wind is so light that it's too heavy in the sky. Drifter even less use.
Where am I at? Have some line extensions coming plus a short axis surf fuse with a big 820 wing. I'll try them all again with that combo I guess