Hi, I have a almost 3 month old and she feeds the same during the night except she doesnt have a df and she is breastfed.
How much is he taking on the other feeds? Does he falls asleep after the 5am feed? When is his next feed, is he hungry than?
His A time is too long hence the 45 minute naps. I put her in her crib after an hour and 10-15 minutes, she naps 1,5h. If I miss her cues she needs help falling asleep ( I hold her while she dozes off) and her naps are 30-45 minutes. If he is up 1,5-2h with a 45 minute nap you still get close to 3h time between feeds so I'd say you are ok there. Still, you should aim for shorter A times and longer naps.
Hope that helps.