Whelp.. It's basicaly a redo of the hexblade class. nothing wrong with that, I think the hexblade neds help. Looking through it I thought it was too much, untill I got to the crappy spell list. Given the spell list as written it's a pretty reasonable class, except for mettle. (I assume you called it audacity because mettle isn't open content yet?)
I don't see how mettle fits the class, or makes much sense given the weak fort and will saves. I personally would strip out mettle and improve the spell list a little. Say add True strike, Spider climb, The mental stat bump spells, The charm line, and maybe just for fun, polymorphs as 4th level spells.
If the spell list was improved that much I'd also chop the savvy casting penalty reduction in half.
Just my 2¢
-Andor