The only change I make when I'm on is I add a 6th day to my routine. Then I keep my split the same while progressing slightly faster than 1/wk/bodypart. In other words, I'm still on a 5 way split, but i'm lifting 6 days a week, so I can take advantage of my improved recovery capabilities. My training intensity goes up all by itself when I'm on, so I make no conscious effort to elevate it.