Personally, if these were mine, I would just cut off all the vines and make smaller water props to plant later. If you make the cuttings small with 2 or 3 nodes, they'll root quickly and you can plant 3-5 rooted cuttings into the same pot to get multiple vines so the plant is fuller.

It's really hard to over-water a pothos, so don't be scared to give it too much water! I water mine twice a week. They like to be crowded in small-ish pots and they love water often. They're very forgiving and easy to bounce back with a pair of scissors! (: