Multi-tabling high-buyin turbo sngs is the way to go.
And the FPPs don't get you to supernova, VPPs do. So right now I'm platinumstar and when I play a $109 sng, I only earn 50 VPPs but i get 125 FPPs, so there's a pretty big difference.
But yeah, it's a pretty wide consensus that multi-tabling the turbos is the way to go (although good luck actually making money in them)