So if we choose a duel target to fight, we should be able to choose what buffs he should play with.For example, void on a normal duel would be pretty easy to fight on. But if we apply 2 to 3 buffs like All or nothing, bane, aspect of evolution on him it will be a little tough to fight on and a good practice.Before the duel fight, choosing the buffs from the available list of buff on our own will be interesting.Thanks for asking