The ProTip here is to get the select few hollow forged triple cranks with 130/74 BCD instead of the 130BCD ones that attach the granny to the middle ring. Depending on your aesthetic you can either lose the big ring or replace it with a guard, like an ultralight BBG ring. Road-Q, DA9000 BB, lighter arms.
FC-7803/6703 put the granny on the middle ring
FC-5603/5703/6603 put the granny on its own BCD