I've been using the Girodisc piston spreader. It can pull six piston quick and easy.
https://www.girodisc.com/Caliper-Pis...ol_p_5970.html
Of note you have to keep the inside pad in the front while spreading as the caliper hanger is in the way of the inside piston (unless you choose to disassemble the hanger from the caliper).
Works for any kind of piston configuration. Some may say it's expensive but time is money
