That fight is suppose to be end in couple of minutes. It a freaking easy fight to be start off with. As far as I recall, there is only 1 dragon skill book available before battle tower being conquered. However there is few dragon armor parts available. If you miss out on them, that your problem already. You just need to time your attack and you can destroy those ballista easily. 1 fire sphere can almost take care of 1 ballista already. I actually hope there are more airborne fights in the game
You can actually get 2 before battle tower, but the second is really hard and you go against lv 20+ enemies near Primordial cave I had to take them 1 by one with alot of potions... The second book should be in the chicken room.
If you like a challenge...go to Orobas Fjords before battle tower lol
