more is better, but the marginal return deminishes rather rapidly
i would say anywhere between 200~300 is good enuf, dont sacrifice too much of ur gear for mf
u want an efficient/fast mfer, not a mfer with 1000% mf n cant complete a run under 5 mins
n u want to include just enuf bosses to kill to hit the 5 mins mark (i heard that bliz would temp restrict u if u make 15 or more games in 1 hour, so 5 mins a run is ideal)