Operating under the assumption that Zlandicar was a three day spawn I looked for evidence relating to him. What I found was that he was likely originally a three day spawn but changed to a longer spawn of unknown length but 5 days seems most in line with evidence.
http://www.eqclerics.org/forums/showthread.php?t=10806
http://everquest.allakhazam.com/db/n...03735563052233
Edit: While researching I found what could possibly be quite informative
http://forums.hossguild.org/forumdis...17-IGB-Archive
this is the raid mob rotation forum of some in era server. Unfortunately the format the administrator chose to keep the info in is quite esoteric. Anyone able to parse this stuff better than I can?