It depends on what type of style you are going for. If your trying to recreate a more realistic look, I think 16mm fisheye is the most common used in real vids. I sometimes take it down 14mm depending on the shot. Lots of guys go to 10mm but i think that distorts the shot a little too much but they make it work for there style.
I just max it out for long lense.
Try doing some long lense shots that really focus close up on the board and mix those with your fisheye.
Your clips may seem boring in game but set too music along with your other clips I think you might feel differently.
And I think you said you can only get 45 second clips, while editing in game hold the right or left bumpers and hit one of your analog sticks. You should be able to cut down the length of your clips this way.