I am looking for advice on building a barb using the half dragon template. He will be lvl 13 (instead of 15) from the template but I am ok with that since the stat bonuses and flavor are awesome. I would like to focus on the rage power body bludgeon. I know this is not optimal from a combat standpoint but im ok with that as well. If anyone has any recomendations or overall build advice it would be greatly appreciated. Heres a list of things to keep in mind.
1. 25 point buy
2. would like to do moderate dmg via natural attacks OR manufactured weapons ( Need to overcome DR ).
3. Ways to get large are always a plus so I wont have to worry about getting enlarge person from party wizard.
4. Focus on grapple/pinning
5. Must have 10 levels of barb to get the power (unless theres another way).
Thanks for any input