You have 3 single-class fighter types in there, plus one multi-figher. I Thief-multi and one Cleric, one Mage multi That seems WAY to heavy on tanks to me, and WAY WAY to light on healers & mages.
Cleric (single class) needs support. Convert one of your fighters into a Fighter/Cleric Multi, so that you have a backup healer. You will NEED him/her! And I would suggest that your Thief be Mage/Thief multi, rather than Fighter/Thief
Just my opinion!
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