I have a solution for the 'no spells when raging' issue, though it will require some feat investment and a class level dip (or more feats). Where are you getting your ability to rage from?
Raging Blood will allow you to mimic the Bloodrage class feature for a certain number of rounds per day. This requires a level dip in Sorcerer, or the feat Eldritch Heritage (which requires Skill Focus or similar).
Mad Magic let you cast spells while in a bloodrage, regardless of their source.
Alternatively, you could just use Furious Spell (metamagic) to prep the spells with a higher spell slot and maintain your ability to cast them while raging. This might be the best option for you.
Hmm, missed that in the title (haha).
As for Furious Spell, I'd toss it on any spell you intend to deal damage with (you should always have a ranged option available), like Call Lightning, Produce Flame, Pale Flame, etc, etc. And, any spells you might want to cast in the middle of combat but are not something you'd cast every fight, and something you don't want to drop out of rage for. Like Wind Wall to deal with enemy ranged characters.
I'd recommend starting with a 16 wisdom, rather than 14, as you'll have to devote every ability score increase to wisdom to eventually catch up with you casting progression, and even rely on stat boosting items to break even until level 20. Even with studied target, you don't want your spell DC's to lag too far behind the curve.
Lashing tail looks fun, maybe deathroll. Since you won't be in the heaviest armor and are a d8 hd class maybe toughness (yeah, boring, I know). Studied target will likely keep your attack bonus high enough for power attack (or piranha strike) to be worthwhile.
If you find that you are reliably getting sneak attack then the Accomplished Sneak Attack feat would be nice.
If you aren't using manufactured weapons at all, then Multiattack should be on your list to pick up.
If you plan on doing anything with your Familiar... then plan on taking Improved Familiar, for something more useful than an iguana.
If you plan on using your Death Roll, then Dirty Fighting/Improved Grapple might make sense.
Something like Barroom Brawler can be especially useful when giving up half your feats to VMC. You can use it to grab Seething Hatred "that guy", for when you really need your Studied Target damage bonus doubled against a specific type of enemy.
Given that you are a 9/9 spellcaster, and are also choosing to invest in Strength... Improved Initiative might make up for your [probably] low Dexterity.
Extra Rage Power @ 17 for Internal Fortitude, since you don't count as an 8th-level Barbarian until 16 [for the purpose of selecting Rage Powers]... have yourself a Flawed Scarlet and Green Cabochon ioun stone, and you essentially have Tireless Rage right on schedule with a normal Barbarian.
You should consider Helm of the Mammoth Lord to get an extra natural attack at a cheap price.
Another thing I would consider is taking the Quick Draw feat and buying a Darkwood Quickdraw shield. This would allow you to draw or stow the shield as a free action and would allow you to make a full attack with both claws and still gain your shield bonus to AC.
if all the natural attacks are primary (like claws and bite) you dont need multiattack. it only lowers the penalties on secondary attacks
Of course. I was not assuming that they'd only stick to the three they have. You merely need to have three to qualify for the feat.