Hi there and welcome to BW!
Hugs for the nw's. I'm thinking that the paci may not be the problem but rather its his routine. His A is really short for a 10 mo old (average A is 3-4 hrs). I would start to increase his A, 10-15 min at a time until his A is around 3.5 hrs and then see how he's doing. When increasing his a, increase by 10-15 min and then wait for 2-3 days for the next increase.
Wrt his dummy, can he re plug himself?
HTH