So, this game's a thing.
Lunatic is no joke this time around. Resources-wise I thinks it's okay, given how you get both lives and bombs, it seems you have to try to score even for basic survival, so as Tengukami said, it encourages you to get good.
I'm iffy about Pointdevice mode right now, it's like a double-edge mechanic. On a full run, it seems a brute force way to get into patterns (as bombs are pretty scarce), and that can get exhausting rather quickly. However, it may very well be just perfect for practice mode, you can basically retry single sections/nonspells/Spells individually however many times you want.
The protags are kind of just there imo. Reimu and Marisa are just, well, Reimu and Marisa, after two games having the exact same thing, I find them pretty boring. Reisen is not as interesting as I thought she would be, but her bomb looks like it would be broken in Pointdevice mode in capable enough hands (but really, Reisen's waves pierce but Marisa's lasers still don't? :wat:). Sanae on the other hand will probably be the girl I go with for this game, she has nice power, both focused and unfocused, and her bomb is not only stupid powerful, it lets you graze, so yeah, I believe she is this game's best shot.