When I batch sparge I do the first runnings, then SPLIT the amount of sparge water into two equal amounts(my mash tun wont hold all the sparge water in one go). Put the first lot in and turn(not stir) the mash and let sit for 20 minutes, drain and repeat.
And never more than twice.
Apparently its only about 2-3% extra from fly sparging, so only really a benefit for commercial quantities