Set Priority: You are guaranteed to get all usable parts for your class.
Offset Priority: You are guaranteed to receive all usable jewelery, rings and neck pieces for the desired specialization.
Relic Priority: You are guaranteed to receive all usable relics for the desired specialization.
Item Guarantee: Guaranteed to receive at least 10 items from your Raid. If no 10 items drop for you, then another raid will take place to complete the missing items.
Set Guarantee: You will get 4 set items guaranteed. If no 4 set items drop for you, another raid will take place for you to complete the missing set items.