I'm surprised to hear that $7 9-man
hypers are still running. Do you play at 1-2 tables at a time? How do you manage to play satisfactory volume there?
(Maybe it's just me, I consider an SNG format dead if I can't 6-table it, lol.)
Is 11.8% your actual ROI or the adjusted ROI ('Game Currency Net Adjusted' winnings in PT4 or 'Luck Adjusted Winnings' in HM2 divided by the total buy-in; the adjustment is made for all-ins according to the ICM and allows to estimate the 'true' ROI preciser)?
Actually, even if your adjusted ROI is such, the sample size is a bit too small.
Anyway, it never hurts to improve your strategy first, so that the $7 regs can't exploit you hard.
I really doubt that anyone besides good $7 regs earns substantially more $ per hour at $7 hypers than at $3.50 ones, considering that some big-name SNG grinders (who were beating $60s-100s in 2015 when Supernova Elite rewards were still on offer) sit at low stakes down to $5-7 at offpeak hours when they lack the volume at their usual stakes...
Have you tried other SNG formats, Spin & Gos, MTTs, etc.?
HNY, crush it!