Let's see, copy this part and raise your hand who did not play MM11.
If they played the challenges, they probably know the heel of Achilles, a challenge to eliminate the enemies with their weaknesses.
What I suggest, is that the arms of megaman 11 have those effects, I mean, if we already have the Picket man weak to Block dropper, or doubt in the other weapons and these are suggestions.
Acid barrier could kill Picket men and other enemies that are weak, which I do not remember.
Chain Blast could break Gabyoals / Spines and Roaders.
Scramble thunder could destroy Joes machines, rabbits and water enemies.
Bouncing ball could destroy those annoying Wall blasters, big enemies, electrics and chemists.
Tundra storm could destroy very well covered enemies.
Pile driver could break protected enemies.
And Blazing thorch could destroy different types of enemies.