I would suggest the 3 tank method however. Its much easier and the foul geyser always goes to the tank that is tanking the slimes. Keeping that in mind, this is only viable with everyone above 150k dps. The slimes need to be slowed and the tank needs to know where he is going to go before the geyser.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&ved=0CDMQtwIwAQ&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DCD4FzrIUJ6k&ei=SdpeUuabDIWx4AOF4oG4Dw&usg=AFQjCNEwI6FMM3OL2OQSWjM2Z4ha7KMQ3w&sig2=A0xvTV3b_YtppmxYKEiFug