WOOHOO Got my pair last nite! I have yet to try them out because I am lvl'in my whm, but i cant wait to try them.
And as for the ones saying you need it for the lvl 20 fights, wrong. I did my fights w/o them, and they were fairly easy, after the first 5 tries :-P
As for getting help with them...good luck. The tonberry that has them does searing light 4-5 times, no joke. As a 57 whm when I used my offering to spawn him, he dropped me to under 100 hp RIGHT off the bat with searing light. WHM's, make sure you have reraise on, b/c you WILL need it. Lets put it this way, a searing light did 656 damage to me (57whm) and 738 to my friend (69blk) And just like that, the whm and blk go down. This dude is not easy, although with proper healing and buffing, he should be fine. Just make sure the blk sleeps the other avatars.