flowing thought five makes this item incredibly valuable.
flowing thought will stack with clarity and bards mana song. this gives you a good 30 or so a tick mana regeneration.
it also has hit points, help migitate the aoe damage
it also has resists, while not great, they are certainly useful.
nice boost in mana
int at this level is easily maxed so no big deal.
charisma is always good ;)