Have you had success with a 2-3-4 schedule or do you maintain consistent wake times during the day? If you used 2-3-4 when did you start and when did your baby outgrow it?

I'm thinking of trying this because LO (almost 8 months) is ready to nap 2hrs after waking, but it's a struggle to get him to take the next two naps after 2hrs of wake time.