So should we assume to start at around 7th 'level' Since the cleric can cast cure critical twice a day?

I'm looking to build A tiefling [url=http://forgottenrealms.wikia.com/wiki/Hexblade]hexblade[/url] to become a [url=http://forgottenrealms.wikia.com/wiki/Thayan_knight]Thayan knight[/url]. My idea is that either he traveled to waterdeep with a red wizard who was killed so now he is looking to get a new life, OR, he can be the protector of anyone willing to play a red wizard.