The time to command will be lower than estimated in this thread. I started little over two years ago and there are only ~70 ARN based FOs between me and the most junior successfull FC737 bid. Some of whom will no doubt bid for a LH position as FO.
Of course people from the other bases are welcome to bid for FC ARN positon as well but this is just to give you an indication of the numbers involved.
Counting danes and norwegians also there are ~300 people in total between the first "newhires" and a coveted successful LH bid.
Make of that what you will.