How to make the most money

[Focused]

Hi there, I'm a fairly decent sng player. roi 34% itm 40% over 1000plus tourneys usually $20/£30 level(with some help from you guys). But I feel like I'm not making as much money as I could be. Are cash games more profitable...and how many tables do people generally play. I usually only play two sng's at a time...what would you say is the optimum amount of tables to play. All the best