Amiri: big bad glass cannon!

[Morgrel76]

Amiri is one of the best dps of the game:
My lvl 7 Amiri is like this:
1 Barbarian (useless lvl)/6 Fighter (2h weapon specialization variant)
I heavily focus on getting Power Attack depending Feats (Cleve, Greater Cleve, Finishing Cleave, Improved Finishing Cleave) + Precise Strike (everyone in my party has it becouse it's a free +1d6 sneak attack).
Got 2h flail +1 corrosive (1d10+1+1d6) and belt of strenght +2.
Full buffed (Bull's Strenght+Enlarge) i have critted over 60hp with Power Attack on and u can easly destroy 2-3 enemy at round becouse of her reach in enlarged version and the ability to do over 25 damage each swing.
The main problem is if any enemy focus her she will go down in 2-3 rounds even if she has 22 AC.
I suggest to bump her enlarged bastard sword for 2 reson:
first her enlarged bastard sword gives -2 to hit and any 2h sword can outdamage her with power attack on (that gives same penality); but second and most important reson i don't think the u can improve her enlarged bastard sword through the game while u can find some 2h sword with plus and special damage ability.
I think if i can find one i will go for an 2h maul (2d6 damage) with special abilities in late game and get weapon focus related feats.
I'm a little sad that she has only 10 charisma so i cannot get 1 lvl in bard or sorcerer and go Dragon Disciple for extra serious damage.