What is a good baseline level for your memoriesto clear content?

So the longer I play, the more I realize the insane resources needed to max level a memory.

At present, I have the memories in primary, secondary, and tertiary color (up to 4 lunar and 2 solar) for each li leveled to 50 and trying to work a few to lvl60. Not all of them have solar memories in all 3 colors or even 4 lunar. I just figured it was a good cover. Solar 5* memories, I'm trying to get to 70 at least. I figure if any cards should be maxed, it should be the limited myth cards (of which, I have 3: both pairs of raf's and caleb's only pair). Sylus and Raf are my mains so I level more of their cards.

I'm stuck at lvl41 in the open orbit and I haven't fully cleared senior hunt yet. Someone who has, could you tell me what levels you aim for with your memories? Do you make up for it with better protocores?