I've played Pit Fighters and love them. But, I do like hand to hand warbands more than shooty ones.
They are very restrictive on weapon choices but I just use some of each style for heroes and henchmen. I do lean heavy on Pursuers for the henchmen.
Hire an ogre in your staring set-up.
You want him to get experience advances as fast as possible.
You also want him to get Lad's Got Talent. That can't happen if you don't hire him!
Do what BalrogTheBuff says about Pursuers and the divide and conquer thing. That last part goes for most any warband too.
And I really don't understand your question about the cost and rarity of the Spiked Gauntlet.
It is very plain in the warband list. Except for the Undead style that comes with one, only the Dwarf and Ogre can have them and they are 15gc. There is nothing in their equipment list that is rare.