Hey, found another one that matches with everything but Diablo Rubio...
Perhaps, Perhaps, Perhaps by Pine Tranio and on
FF.net.
Summary: Five years after Seeing Red, a chipless, soulless Spike has a new life, new friends, new job and unlife is good. But then, the Slayer tracks him down in Buenos Aires. Can they get along and stop the threat that takes them to England and to the Council?
Buffy finds Spike in Argentina asking for his help, they travel to England. A watcher (Travers' son) is named Colin. Spike has a leprechaun friend named Shamus O'Malley and later on there's a scene in Stonehenge where Spike gets electrocuted. Maybe you got some fics mixed up?...
