If your grinding S&G, (I did this on FT back in the day when US players could play there, won $1200 with no deposit) I'd play the 9 person, remember the objective is to finish in the top 3.. yes you want to win, but every time you finish in the money is a "win".
Watch people, make notes on them, what their method of play is, what their ranges are. This will help you tremendously in future games against them.
If you haven't done so already, download the S&G wizard, back when I did it, it was free for 90 days, I think it's only 30 now.
This program is excellent for learning equity and they have practice on it, as well as analysis of games you've played when they are done, to find out where your making mistakes.
I can guarantee you your ROI will get better with it.
Play as many games at a time as you can comfortably do without making mistakes.
It's also not a bad idea once your bankroll is built up, to play once in a while in a 45-90 person or a big MTT.