Help make a marshal

[Solo]

"I am a Commissar. I am empowered to deliver justice wher ever I see it lacking. I am empowered to punish cowardice. I am granted the gift of total authority to judge, in the name of the Emperor, on the field of combat."
Colonel-Commissar Ibram Gaunt

This is roughly how a commissar behaves.

Commissioner Holt
Male Human Marshal
Level 7, Init +6, HP 57/57, Speed 20
AC 22, Touch 15, Flat-footed 20, Fort +9, Ref +5, Will +6, Base Attack Bonus +5   
+1 Longsword +8 (1d8+3, 19-20, x2)
+1 strength rating Composite Longbow (100) +8 (1d8+1, x3)
+1 Mithril Chain Shirt, Masterwork Heavy Shield (+5 Armor, +2 Shield, +2 Dex, +1 Deflect, +2 Misc)
Abilities Str 14, Dex 14, Con 16, Int 12, Wis 10, Cha 19
Condition Angry

How can I make this guy the terrifying backbone of an army? I'm still not quite sure what would make for a mechanically effective Marshal. He's an NPC for a mostly 3.5 game, but whose skill and feat system is inspired by Pathfinder.

[bhu]

are you allowed homebrew?

[Solo]

I am the DM

[bhu]

http://www.minmaxboards.com/index.php?topic=779.msg4505#msg4505 peek at the feats at the bottom of this PrC, they may give you some flexibility.  I think I've got more somewhere I just need to find them.