WhiteofHeart said..
Im 95 kgs and get out fine in 8-12 knots, but you'd have to be thinking racing kit. Formula ish board, race foil and 9.0/10.0 foil racing sail or maybe 8.5 freeride foiling sail.
And loads of practice & pumping.
Kitefoiling will easily get you out in 8 knots by the way, and it wouldnt even be hard work to get going.
The other option is also a foil specific board with track system that can take a slingshot infinity 99. Its top end won't be there but it flies really early and foils like cadillac compared to a race foil. Really depends on what you want to do.
In 8-12 kts I've tried 5.0-6.6 w/ the 99 and 76. I usually need 6.6 on the infinity 76 and have to wait more for gusts, but the 99 doesn't take as much. OR I go out on an all out race rig 9.0, 900 front, and 115+ fuse.
In either case, I have to be pumping. My hybrid fin/foil board works decently with the 76, but the 99 center of lift isn't forward enough to jibe really. I would need a slingshot board that can accept it.
Before I had a clue about pumping I was able to use an 8.0 with the 99 in something like that wind. I got it going, but when the wind picked up later, within fin planing speed of the 8.0, the combination of that sail and foil was near impossible for me to control and I had to flag the sail and drift home. I also didn't know how to get downwind on a foil, but it would have been very hairy regardless. My weight here looks to have been about 190ish or a little less.
Similar conditions, maybe with the wind lighter. You can see that I get going here after pumping a bunch about 40s into the video. I'm going a lot faster but this is also the race kit. I can even pump somewhat better now as I wasn't giving the foil as much of a kick as I have learned to do recently.