Actually Iron Brago is a really good Legend IMO

I am glad I managed to get him thru fusion. Only cost me extra energy to run the events over and over

But what I want to add to OP is I do hope the DUPE Legend solution will include some form of "Universal fragment" that would allow us to complete some  of these situations by destroying our duplicate Legends for universal fragments we could spend  on fusions we see fit

I'm also waiting for an offer to complete iron brago ... It's getting long to wait. He could say whether or not there will be one ...