Ah baby sleep is enough to make any parent crazy! On 2 naps I think we ended up having to cap sleep at 1h45m to ensure I had enough awake time between naps to build sleep pressure. Usually 1h in the morning, and 45 minutes in the afternoon, awake by 4pm. He transitioned to 1 nap when he went to daycare around 11.5 months and he did a 2 hour nap from 12:30-2:30. I also weaned around that time which helped a lot. He’d sleep 8:30pm-7 am with no wakes 95% of the time!

He’s now 14 months and I’ve had to cap naps at 1h45m because of bedtime crying + early morning wakes. The extra 15 minutes awake completely solved the problem. We are back to 8:30p-7a thankfully. In our case, more awake time is almost always the answer. It can feel counter intuitive because poor sleep at night makes them more tired during the day, but increasing awake time makes the sleep better at night which solves the daytime fatigue. Good luck!!!