Tips from me:
*Slavery is a GREAT way to get yourself tons of money-- but it really sucks using most bashing weapons. Stick to rocks! Rocks allow both a shield, and good distance. Headshots will afford you a little bit of leeway. I find using two large bags is enough to take care of a group of 10-20 soldiers, though you will run out so throw sparingly. The reticle wont get too huge when moving, but it seems the rocks favor the middle-left of the reticle-- so keep moving and pelting, because you can throw relatively fast.
*Do not discount polearms! Using a polearm often has three benefits: It can often be two or single handed (With the exception of a few pikes and the poleaxes/voulges/similar) Their reach is unparalleled. They also do very decent damage, and can take horses out easily. The third benefit is using it in a jousting position (The game calls this crouched spear damage.) You can easily take a man out on either horseback or on foot this way-- use it to your advantage!
Borcha is a great character-- especially at lower levels. With the trainer skill, you can give EXP to your party members every day (or hour... I forget.) So this might be a valuable skill for you to take. Further, equipping borcha with rocks and a shield, as well as a sword for backup, almost garuntees he'll last a little longer then normal. Just note, if any man charges into a group, you can expect them to be KO'ed
*Take advantage of your party members skills! Things such as riding and tracking can really help you out. Get borcha at least a basic horse, and he'll do just fine out there. A polearm would likely do him service as well, for the reach can keep him alive longer.
*Best sword I've seen, is the bastard sword. The good point about this sword is it's reach, and the fact it can be used one-handed with a shield, granting you the reach of a lower level polearm, while at the same time giving you freedom to use either a two handed weapon or a one handed weapon (depending on your mood towards either.)