Arbiters are in my opinon not a very good investment. They are rather easily killed seeing as how they are kind of slow, people usually have observers unless they are a newb which if thisis the case arbiters arnt of much need. But they do sometimes come in usefull, but very rare in my experience. I as well as some of my friends can usually have an opponent dead before they get to the point of arbiters, as well as before we get there. Im sure they are good for those would use the SAME strat as everyone else does but i prefer being different so when i beat the usuall person i can say, hey my strat worked better then the one EVERYONE else uses and I thought it up myself, which basically says im better then everyone else. Which is not the case but w/e, i say that to myself to motivate me to be even better. I strive to be the best.