Using a metronome would probably help.
I'm assuming you use 2-pair.
When I did 2-pair I saw the pairs as 2 different pairs. The one that you paired up with just a Dw/Dw'/Rw/-Rw' was the base pair. The pair you made when you finished it was the complementary pair.
I looked for the base pair while doing the previous pairs, then while I was putting the base pairs in place I looked for the complementary pairs, etc.
Oh, & also, practice. I did an AO12 every day for about 2 weeks & went from 2:00 to 1:20.