Rancor Collar (and I believe, though I'd have to check again Wivre w/+2crit) are better than Faith for MNK

Anyway, a neckpiece with 5acc 5%crithit is unheard of, and is easily the best TP/WS piece for every job given it's a good situation to use it in (eg, not tanking/taking crit hp moves) or you aren't capped crit% already or super close (nin may be an exception)

Will something better come out? Probably. Is something better out now? No.

That should be all anyone needs to motivate them to get one.