in their long and illustrious careers, warne averaged 25 overs per innings, Hadlee - 24. Garner - 20 and Marshall - 19. That nicely adds up to 88 overs. considering their SR, that should be good enough to bowl the opposition out (for about 250 runs). If they need a breather, there are those useful part timers already mentioned above. no great team needed five full fledged bowlers to win consistently. four great bowlers are difficult to come together at the same time for selection. But when they rarely do, they are more than enough to do the job.