I got a bunch of money to buy my first set of good dwarven armor by getting a quest to collect 7 good metal scraps, I got them by helping a Dale army vs a Rhun army, with 100 guys on each side and 20 in my party. I wound up getting knocked out half way through the fight, but the Dale troops won and the loot was 8 good metal scrap and several horses. Turning in 7 of the scraps gave me 3500 resource points (it's 500 per good scrap in that quest).
I followed the Dale forces around helping them against the Rhun forces over and over and ended up with enough rank and influence to get a Bow of Bard (requires rank 10), it's the best bow I've seen yet. It deals pierce instead of cut damage, and requires power draw 5. With it I've been one shotting the armored Rhun riders as they charge my dwarves, and it's fast enough that I can pick off half a dozen or so before they get to us. Really takes the bite out of their cavalry charges.
Now that I can drop the Rhun riders so quickly, the warg riders are more dangerous than the Rhun heavy cavalry. The goblin riders drop easy enough (1 shot), but those wargs are tough to down. They take 2 or 3 arrows each and seem to be more dangerous riderless than with a rider. With a rider they ride in and slow down to hit a target leaving the warg vulnerable to my dwarves' axes, riderless they just barrel back and forth through my lines knocking everyone down until someone manages to kill them, which sometimes takes 3 or 4 passes. Get 10 wargs doing that and my poor dwarves are falling left and right to the wargs. Throw in some goblins rushing in and stabbing them when they're down and it's chaos.
It's funny because a wave of warg riders will come in and my dwarves will throw their throwing axes and kill half the riders - then the wargs themselves do more damage than the riders ever could have. Too bad I can't tell my dwarves to throw the axes at the mounts instead.
Not that I'm complaining, without the wargs the goblins don't really stand a chance. It's frantic and fun when I have riderless wargs dashing through my lines, wargs with riders riding around behind throwing javelins, goblin archers up on a hill hitting my guys in the back when they turn to fight the wargs behind them, and a line of goblin infantry rushing in to stab my poor dwarves when they fall. And all through this I'm running around frantically shooting wargs as they approach and readying my men for a charge when the goblin infantry get in range - only stopping to loot arrows from dead goblins as we advance across the map.