Size damage stacking again

[Lord Lupus the Grey]

Sorry, but I'm just curious, if everything right, because some FAQs made me worry about a build:

Bloodrater (Dragon blood) (Rageshaper)

Claw, that deals 1d8 already.

Class ability, that makes it bigger (Bestial Aspect)
+
Improved Natural Attack feat
+
Enlarge Person
+
Strongjaw spell from my druid friend
=
6d8

Am i right? Maybe, some things of theese do not stack?

[dragonhunterq]

Only two of those will be effective - without links I am unsure which would be the best two (probably enlarge and strongjaw)- you can have one actual size increase and one "as if" size increase - no more.

[Leitner]

Best you could do would be strongjaw+enlarge person. Which I believe would make out at 4d6 if I did the math correctly there.