I don't know if this is necessarily a guide but it seemed like it fit best here. Training archery is rather simple as basically I just shot my other account mage over and over while healing him every 8 seconds. Any longer of a pause and he was getting close to being dead. Also my archer is GM healing so if you have less than that it will make a difference. So perhaps you are thinking... well how many arrows will I have to buy to GM archery? That's what I am about to tell you! To take archery from 49 (my starting skill) to 100 it took 8,070 arrows. Not bad. Also a note, my newbie bow which was unused when I started broke after 6,089 arrows were used. Plan accordingly and good luck.