There is early access to the battlefield 1 key. A key in the haystack in a spider cage in the first (cellblock) level opens a chest in the cellblock. You can see where you need to go on this map:
http://beyond.divinedivinity.net/help/act1_citadel01.htmI had a really hard time finding that chest even after I saw the map because it's behind a column of steam and a chain, but it's there <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
The whole first area is MUCH easier if you level up early in the battlefield. I found I was able to make it on Tactical by doing that, whereas before a few early beasties were wiping the floor with me.
And I have to disagree about arrows, by the way. A main character archer with a DK tank (sword/shield) is a fantastic combination. I didn't put my bow skills in accuracy, though -- concentrated on reload time and critical hit, since these two reinforce each other (more arrows=more crit hits). There are so many elemental arrows to be found too that you can easily specialize damage by enemy.