Pointing down helped in not soaking the diaper in the first 3-4 hours
But... at the end of the night the Huggies Overnight plus the diaper doubler pad still leaked out the top right side. DS was wet when we all woke up.
I have noticed that while the front and middle of the diaper and the diaper doubler were completely soaked, the back of the diaper and a bit of a diaper pad were dry. So, the combo has more absorbency, but somehow it's not absorbing - even with pointing down. If your baby is a side/stomach sleeper I suppose this is what happens.
So far, we are back to changing his diaper before going to bed, when he is still asleep, gently turn him around and quickly change then nurse back to sleep. Like a "dream feed", only it's like a "dream diaper change".
I think situation will not be the same if your baby STTN, you should try the Huggies overnight (plus diaper doubler or even without) and point down. If your baby is not nursing between let's say 11pm and 6am, the diaper solution I used should work. He didn't soak it until towards the morning after his two more nursing sessions in the middle of the night.
So, until he STTN I may have to change him, or maybe try the G-diaper with two inserts next? G-diaper seems to fit like a pant around the waist. Maybe some of its inserts are more absorbent and the pee would spread throughout the diaper pad as opposed to saturate the front and leak out the top.