Mavs is ridiculously imbalanced, much more than any other set, the necessity of the extra arrows outweighs conv ridiculously, considering any sorc has other options to deal with immunes (hybrid/merc/lr charges)
A java clears cows way faster than any bow too ;p
Certainly not more expensive either, you can find required pieces for a quick effective java in like, nightmare meph/chaos runs
Also agree about an Aldurs buff but that's another discussion that's been brought up already