I tend to go with What works, if I can make a party go past Lich, then I will take the time to finish it, even if there is more then one of the same type of character in it. my latest game was Ni/Ma/Ma/WW, which was pretty easy after the BB's got to level.10, and even more easy when they got above 15+, it was almost like overkill once I got to level.50