I'm not sure the 3rd spell would be easier by approaching the bowl. Even on Easy, where there aren't many small knives, I find that streaming the large knives at close range forces you to the side, so you're not always under the bowl. (If you have a replay that shows otherwise, could you upload it?)
It's definitely useful for the final spell and 2nd nonspell though.
Interesting how you can actually go that far into the bowl. Assuming it can be done reliably for the final spell, it'd gain about a million (every million counts) over my current SakuyaB score, and 2 million for my MarisaA score...