I think this will differ for each player them shelves....
For me it's double tabling full-ring starting with $50@2nl, then when I reach $150-$200 moving to 5nl and than @ $500 10nl during the week. While switching to longer blind level(10+ min) $5+ MTT's on the weekends. This why I find I can majority of the weeks at least grow my
bankroll slowly as I usually don't do terrible at both formats in the same week. Overall I make more money from cash than MTT's but when I do get a good MTT hit(final or win) my bankroll grow by a big margin all at once.
Full-ring cash and longer blind MTT's also reduce variance and luck as much as possible which is easier mentally. Poker has enough variance without playing turbos and fast games/formats.
Cheers!!!