I still stand by this:The setup for the triple-burst build is not hard at all (just Yori Lance during Burst Hour, abi1 -> Full Burst -> 2-A -> full burst after 3 turns (easy with Tiara sets) -> abi1 + 3-C).
But again, I personally find that Medea makes farming everything so much faster that it's probably better to unlock her first. Your personal experience may vary, if you like to manual raids for two Burst Hours every day for example.