Yeah, Brother Frog is a toughie! He guards and heals well enough to punish conservative die bags, sucks up board space to punish terrain, boost, and/or heavy die bags, and has enough endurance to go toe to toe with aggressive bags. I usually grind him down in an attrition battle with a small highly leveled balanced bag, then either recover hp/armor with him to run it all over again or capitalize on a boost die mistake he makes to get that last bit of damage in.