I have posted this on the spin and go section but i didn't get any answers so i am re-posting it here

Im currently 4 tabling the 7$ HU hypers on stars. I want to move up higher but all that awaits me are the divisions at the 30s and above and Im not bothered to try and get into them. I suck at all non hyper turbo forms of poker so spin and go's seem to be the way to go. I have a few general questions about them. 

1. What are the lowest beatable stakes on stars in spin and gos. The 7% rake at the $1 level and the 6% rake at the 3 and 7 dollar level seem really high compared to heads up hypers. I would like to see some graphs of people beating these games over a large sample if anyone has them. 

2. I feel pretty confident heads up against the total fish cakes that inhabit these games at low stakes. So should I just buy coffeyyays video pack for everything else?

3. My bankroll is currently at 2K. How many buyins would you recommend for these games. In HU hypers when i was moving up. I used a system of moving up once I had 40 buyins for the next level up and moving down when I dropped below 35 buyins for my current level. Can I use something similiar for these games? I hate the system that is sometimes recommended of moving up once you have 100 buyins for the next level in HU hypers. It is way too slow. I'm willing to move up and down quickly so what would be the best way to do it?

4. Any graphs at any stakes at a large sample in these games would also be appreciated. Thanks.