Damages are quite fine with looms ... Buff only unloomed stuff.
And I agree with ottomansniper , the gap between xbows and bows is quite vast ... and bow isn't so cheaper than xbows ... So , I would suggest to adapt price of bows, because you can become easily a good crossbowman without practice, but that's much harder to become accurate with bows ...
Archers don't need a "big" buff, but a small buff , on prices for example ... Longbow = 11000 gold / Arbalest = 180000 gold
Arbalest 1 shot everything , with high accuracy , and time of reload can be improved by wpf in crossbow.
Longbow, for example, never 1 shot (only peasants) , and is highly inaccurate for his price.