every item that increases the AMOUNT of turn undead, does the same with burst/auras of radiant servant
those items are the following
http://ddowiki.com/page/Lesser_Turning
if u're interested in gear for optimizing the turn undead mechanic i suggest to read this
http://forums.ddo.com/showthread.php?t=367872
http://ddowiki.com/page/Turn_Undead
it's nice to be OP with the turn undead, cause even being 1st life u can survive mostly with bb and turn undead spam
it get funnier when u have some clr pl, cause even dumping your cha undeads are destroyed in korthos (y, not turned, destroyed like if u were radiant servant XD)