Is the Runed Coldain Prayer Shawl worth it for a Knight?

[long.liam]

I couldn't find anyone who has asked this before in the Forums. Is it worth completing the Quests for the Runed Coldain Prayer Shawl for a Paladin, Shadowknight, or Ranger? I'd imagine it wouldn't be worth it for a Bard, because they hardly use mana for anything, except one of their charm spells, and I'm not sure they even get benefit from flowing thought anyway. However, I do wonder if it's worth it for the other 3 hybrid classes? Especially since they do not get very much in the way of mana regeneration abilities anyway.