Probably not what you want to hear, but...
Leave Abimelech, and work on another ancestor or line, not for a day or a week, but for at least a month. Then come back to Abimelech with fresh eyes, and you may notice something you didn't see before which gets you past him. Works for me, a large percentage of the time.
On the profile of Abimelec Pate there is a note saying:
"Abimilech's parents are not known. There have been several trees on ancestry.com linking him to Bennet Pate. These trees list no sources"
I don't think there are any sources on the Geni tree either, are there?