If someone can interpret how AoE is calculated then
Radius:
-K: 6
-PW: 6
-C: 4
AoE damage multiplier:
-K: 1/0.35/0.1
-PW: 1/0.5/0.3
-C:1/0.5/0.15
This pretty much means that PW have most deadly AoE of them all on top of alpha strike damage and calliope have least deadly one.
Pwerfer at the far end of its AoE does 24 dmg while katy does 8 and calli 12 but have 50% lower radius.