this would be useful for specific maps, allow for meta to be more diverse and also combines really well with my other suggestion
like for example you could have a unit with 3 cones facing in all different directions which would act like a half circle aoe kind of but more split up, or chained circles, and allow for all around attacks to not have to be full aoe so you could have several circles instead of one big one (each one will proc passives individually)