ZFS best resilver settings?

[Quartz]

(Not sure if this should be asked of -questions or -fs, I'll try here first)

What's the best practice advice these days for how resilvering should be 
set, assuming that "rebuilding the array before another drive dies" is 
the only goal? Should the resilver be maxed out so it completes as fast 
as possible before another drive dies, should it be set as low as 
possible to minimize load on the other drives to reduce the chances of 
one dying, or does it matter?