I cleared. Green ship get. The clear bonus is pretty big, but I'm not 100% sure what determines it. The PIV makes up a good chunk of it of it... 1k points per PIV. That leaves 54m, of which I'm guessing 24m is the stage (previous stages were all Stage * 4 million) and spare lives are 15m. Not sure what bombs are worth though. Maybe 3 or 5?
Thinking of trying easy now but I'll need a route for that. Though I guess I need to unlock practice before I can make a route for it... Need to look into green orb collection after spells more too, since it seems to give you bonus orbs for capping, but I haven't really bothered to count yet to see how big this bonus is (might still be worth bomb milking a few spells?). They're worth a bit just for collecting too (1k each, so 3k/graze), plus the obvious PIV increase, so it may be worth forgoing items to gain orbs in some cases I guess? I dunno, I'll figure it out eventually. Oh and then I'll have to do bomb comparisons too I guess. Fun.