Just don't waste time getting top scores on anything that's not at least [Insane]. Playing maps you can barely complete is a good way to improve, except if you rely on spamming on certain parts you can't understand at all and manage to survive that way.I've never really been into that hole top score thing, i think i will start doing that only when I've ''mastered'' this game and i can complete every song. My way of understanding parts i can't understand is by putting it to half speed or auto and then looking at it closely, if that does not work i just give up and move up to another song. Its worked so far pretty well. Although i have a couple songs that i completed that way like for example DeltaMax (outdated).
By the way, i really appreciate all the help! I've been welcome'd pretty well to this community, compared to like LoL community this place is an heaven.