It's not exactly the world's most comfortable question for a guild leader, but I like how Derevka lays the issue out so matter-of-factly, and then goes on to address an interesting point concerning Val'anyr's proc. Your ideal candidate is a good healer with great attendance who plans on hanging around for a while, but then there's the question -- which class gets the most use out of the proc?
Between Derevka's commentary and a few notes from the Wowhead thread, it does seem as if Paladins and Discipline Priests are the classes/specs most suited to Val'anyr's shield proc. This is somewhat disappointing for me as a Druid, but then, nothing about the mace is set in stone until 3.1 actually goes live. How is your guild deciding how to assign this much sought-after piece?