2 Subject Test Questions

This is a really common one, so I apologize in advance, but is a 720 on the Lit subject test a good score for mildly competitive schools like the UCs, USC, Tufts, Georgetown etc? Is it worth submitting?

Also, although I think it tends to be one of my strongest subjects, I scored a dismal 620 on the US History subject test… So that’s obviously not worth submitting. I found that the majority of the questions were incredibly specific and tedious, just not what I had prepared for. However I received a 4 on the APUSH exam. Would it look weird if I opted to submit one AP score and one subject test score? Or would that look like I’m hiding something (which I guess, in fact, I am)?
And on that note, does it look weird if I were to selectively submit AP scores and omit most of them? Most of them are only 3s.