question: why unarmed attacks? i could see you getting by with the usual claw/claw/bite NA build, and you dont get the monks extra attack from ki (afaik, anyway). since quivering palm is optional and late in coming there isnt much point int taking it--also i think you can deliver the quivering palm via claw or bite attack if you have feral combat training, so that might be a thing if you MUST go for it.
unarmed for those without flurry is kinda hard to do without investing in the TWF line (unless they have a gimmicky way around it, like the 'captain falcon' build) or abusing AoOs and style feats (crane+snake is pretty baller, though you'd want to dip 2 levels in MoMS monk to grab snake style without the middle feat)
Plus-unless I am reading it wrong-the claws count as having unarmed strike, which means you can go directly into things like style feats and such.
Anyway, I generally hear that 3 natural attacks are fine powerwise until you get around +10 BAB, which would be level 14 for you. And a lot of games do not go over that if you start at level 1. The reason why natural attack builds work so well compared to a traditional unarmed build is because primary attacks always hit at full BAB and strength damage, so you can reliably use power attack with them in order to boost your damage.
You might also wish to look into the tengu racial feats like Tengu wings and Tengu Raven form. Having easy access to flight is great for a melee character, and you do not have as much need to pick a mystery that provides it then, and raven form provides a nice amount of additional strength for your attacks.