This character must be a dwarf, because I don't see the feat for exotic weapon prof (waraxe). That means the less-than-optimal feat choices are because he wants to go dwarven defender, which is a great choice.
It also might be interesting to see your stats. But judging from above, you have Str 16. (+6 BAB + 3 Str + 1 WF + 1 axe). Also remember, weapon specialization is +2 to damage, not +1...but the -1 penalty to damage from a silver weapon makes your damage correct.
Also remember, that all those spellcasters you just mentioned are higher level than you. I'm pretty sure at level 6 you can't cast polymorph or scintellating sphere.
At Str 16, you probably should look to find ways to increase it. That's alright, but it really it really should be better. You also should consider using your waraxe two-handed and then using power attack. The 2-for-1 trade off on damage is well worth it.
Finally, in a few levels you will get melee weapon mastery (slashing) which means another +2 to hit and damage...and if you stick with fighter through level 8 then you can get greater weapon focus too. So by level 9, you could be at: +9 BAB + 3 Str + 2 wf + 1 axe + 2 mwm = +17/+12. And dmg = 1d10 + 3 str + 2 ws + 2 mwm + 1 axe - 1 silver = 1d10 + 7
It also might be interesting to see your stats. But judging from above, you have Str 16. (+6 BAB + 3 Str + 1 WF + 1 axe). Also remember, weapon specialization is +2 to damage, not +1...but the -1 penalty to damage from a silver weapon makes your damage correct.
Also remember, that all those spellcasters you just mentioned are higher level than you. I'm pretty sure at level 6 you can't cast polymorph or scintellating sphere.
At Str 16, you probably should look to find ways to increase it. That's alright, but it really it really should be better. You also should consider using your waraxe two-handed and then using power attack. The 2-for-1 trade off on damage is well worth it.
Finally, in a few levels you will get melee weapon mastery (slashing) which means another +2 to hit and damage...and if you stick with fighter through level 8 then you can get greater weapon focus too. So by level 9, you could be at: +9 BAB + 3 Str + 2 wf + 1 axe + 2 mwm = +17/+12. And dmg = 1d10 + 3 str + 2 ws + 2 mwm + 1 axe - 1 silver = 1d10 + 7