Okay so I was just messing around with my characters and decided to make a combo of fighter barbarian. Well the main concern is will this type of character be or sustain it's ability till level 12? or possible even higher. Here is the stats...
Str:18
Dex:16
Con:12
Rest dumps. Atm I switch between using a thf weapon, usually maul or greataxe and 2 longswords here are my feats also...
Level 1 Fighter:Toughness and two weapon fighting.
Level 2 Fighter: Power Attack
Level 3 Barbarian: Oversized weapon fighting
Level 4 Barbarian:

Enhancements now...
Fighter Haste I
Fighter Strength I
Racial Toughness I
Barbarian Extra Rage I
Barbarian Power Attack
Barbarian Willpower I
Improved Spell Resistance I
Barbarian Constitution
Fighter Toughness

I'm trying to max out the strength on this build, and dps. What should be my next steps. Comments are appreciated