according to sharkscope, my sng roi is 3-4% and my mtt roi is 130-140%, but that's because i only play $1-2 sng and $1-2 mtts. given that, i don't think roi is the best measurement to determine the bankroll amount. roi can be misleading especially as you go up higher in the stakes so perhaps the 40-50bi makes the most sense. any others have thoughts or is this the consensus?