I don't know if this is possible nor if the randomizer already interpret this but is it possible to add a function/option that allows major/event bosses such as ashnard, black knight, bryce, etc, to not be randomized? My only worry is the black knight fight becoming a joke due to him being a heron etc... and making the endgame pointless.
TLDR: Option to have Major bosses with event classes to not be randomized