One thing not mentioned so far is a wisdom of 12. You need 14 to get lvl4 spells and freedom is a very useful spell.
Another is AC. With no tumble points and no shield you are already at least 7AC down and would end up at 11AC down at level40. The most important thing you could do is multiclass to get tumble as a class skill. You have a few points in lore, search etc, so you could think about Harper Scout and get 2 extra Gt Cha feats, but without Divine Might/Shield it won't be very helpful to this character.
An important tactic for someone wielding a large weapon is disarm. The larger the relative size difference between your weapon and your enemy's weapon, the more bonus you get to your disarm attempt. Obviously Improved disarm improves your chances further, and those feats needs INT 13. Once you have disarmed him it effectively increases your AC.
Another way to improve your AC on the fly is with expertise and improved expertise and aagin you'll need INT 13. Make it 14 as per the advice about even numbers above, and now you can easily afford, max tumble, max discipline, concentration, some taunt, heal perhaps. Depends on your environment, but INT points should not be skimped on unless it's a very high magic world with items with everything on.
Soooo...
STR 13+
DEX 8
CON ?
INT 14
WIS 14
CHA ?
... is where I would start.
Feat wise, I'd get extend spell so that you can extend your divine favour and move lvl2 spells to lvl 3. Knockdown is another near must have feat as an anti-caster tactic.
Have fun
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