It doesnt seem likely that you will have 5 R in fish to wipe out an angel. I have the same thought in regards to Arrogant wurm. Anything smaller than that you can kill with Grim Lavamancer, so any possible edge this card might give you should already be covered by other cards.
I believe what Ben is saying is true. There really isn't anything that's worthwhile pinging that you can't already remove with Grim Lavamancer.
Also, what were you suggesting being removed to accomodate the Dizzying Gazes?
Pac