>>1091
Hol Horse intentionally worked with J. Geils because Hangman can attack someone without causing a lot of attention, allowing his bullets to land the killing blow (hence why he thought J. made a good partner). If J. Geil was stupid*, Hol Horse wouldn't have bothered with him. He could have helped Jotaro and Joseph after the Enya incident, but he told them he is still loyal to Dio.
I just can't see him working with a guy he tried to kill more than once.
*Hangman could probably work with a lot of the assassins with the exception of Death, Yellow Temperance, Tower, most of the Egyptian assassins, Lovers, and High Priestess.