As a Fighter, even a Battlerager, you should probably focus on your role as a Defender- if you want to do damage, just play a Slayer.
Keeping the basic character idea (Half-orc Battlerage Fighter), I would focus on STR and CON pretty heavily- STR 17 (19), CON 15, DEX 11 (13), INT 8, WIS 12, CHA 10. At level 4, bump STR and CON to 20 and 16. Without a shield, I would opt for scale instead of chain- you lose a minimal bump to damage, but get better AC; if you really can't live without the damage pick up Weapon Focus- ax or Weapon Proficiency- Execution Ax at level 2. But right now, we have 3 strikers (Blackguard, Hexblade, Rogue)- as far as Defenders go, you're it- and we only have one leader for a pretty big party.
Again, I haven't played a Battlerager, though I've seen them in play. Your mileage may vary.
To cut off my train of thought- I'll give you the same advice I always get, when I have a pile of concepts (or a really crazy idea)- Play the character you want to play, and how you want to play him.
