There will be two battles which in both all characters will be bloodlust, and the Pain in this battle is Yahiko and not Nagato. The characters in Death City that are in both battles are Maka, Black Star, Kid Death, Asura, and Lord Death(and yes with there Weapons like Soul and what not.)
Pain(Yahiko) vs. all of the following Soul Eater characters in this battle at once.
Pain(Yahiko) with the Six Paths vs. all the following Soul Eater characters in this battle at once.
Six Path of Pain
Both battle location is at Death City.