https://www.mpgh.net/forum/showthread.php?t=1343766
You need to be at least level 61.
You could also do packet spamming, it's not fast but it's easy XP I guess. ShatterGlass mirror's quests have to be finished then you just packet spam this in /hedgemaze:
Code:%xt%zm%acceptQuest%20135%5301% %xt%zm%getMapItem%20135%4680% %xt%zm%tryQuestComplete%20135%5301%-1%false%wvz%