Just park one char at the spawning spot ...
Logg your alt(better use some addon to track spawntime etc)farm other rares,and when Huolon spawns,just relogg and logg to other char,tag and loot
Best way to do this is have 2 clients open and when Huolon spawns just kick your other char.
Thats the way i'm doing this..just not with Huolon only.
Hope someone will find this usefull.