My thoughts is that wave level 1 is too powerful offensive wise, I would prefer lv 2 mini-wave instead, which can complement curse to spread on wider field. Curse is fine ability, Imagine if it can shut down warp completely on field. But reducing the duration to 3-4 second is ok, to balance out ability spread. Target angel might be too overkill even if I want to have reliable Winged Pigge counter, i'll go with Curse Immune instead only because of PONOS' obsession with Immune/Resist talents, and the fear of making units too powerful.