Caveat emptor: TWF feats applying to animal forms was confirmed as not WAI over a year ago; and getting to take SWF on top of rgr TWF feats is considered a bug, IIRC, although it's not on the Known Issues list. Also Dance of Death apparently works with animal forms; but if TWF is not WAI, I'm pretty sure this is not WAI too. So this build piles one bug / exploit on top of another and is always one patch away from getting nerfed into the ground.
That's one option, though druid 12 only gets you lvl 6 spells; you need druid 15 (e.g.,
15/3/2 split) if you want lvl 8 spells. Another would be rgr 6 / monk 3 / druid 11: you lose Shadow Veil, but can add Dance of Death from Tempest while keeping lvl 6 spells.
Ninja Training doesn't apply to unarmed atks inc. animal forms, unfortunately; STR-to-dmg is your only option currently. So right off the bat, you need to decide if STR-based for better melee DPS or WIS-based for better DCs is more important to you.