i dont think you need to only rely on going over your boss as that can get you in trouble. in my experience i was working with people at my level and the word would get up to their boss on my work. i think that was key. it became clear i was the one doing all the work and soon requests started coming directly to me instead of through my boss.

however you get to it i think thats the key. that other people outside of your boss see the work your doing.