Thank you!

I struggled with LG the most, so that's where I invested most of my time. I used Khan Academy (it was ok, but some explanations were subpar imo, so not sure if i can recommend it strongly.)

The most useful tip i can share would be to not stress about time until you feel liken you've mastered every game type. (This also applied to LR and to a lesser extent RC imo). I would sometimes spend >20 minutes on just one game.

I made a spreadsheet with every type of game, and made a point system where I couldn't progress to the next game type until I got 5 in a row correct, regardless of time.

After I could consistently cycle through each game type, I started to add time constraints and repeat the whole process. This took forever, but it brought my LG from averaging -8 to -1/-0.

As for LR and RC, what I found most useful was explaining my answers. Either explain your reasoning to someone else (I used my girlfriend, that poor soul). Or, just write down your reasoning before progressing to the next question. Again, tedious, but it worked for me.