You can technically do charts in any grouping games, but really the only one you NEED to do charts on would be grouping games w/ repeating variables. IMO

You don't really elaborate on your method for LG's. My avg for LG is -1.6. It is by far my best section. I would suggest that you learn the types of logic games, so you know which game boards to use. Visually writing out the game boards is the easiest way to answer all of the questions. Visually showing your inferences makes the games easier. You should try and do a wide range of LG questions rather than the same ones over and over. If you mess up on a specific question type watch the explanations of them. You want to get to a point where you spend a majority of your time making all the game boards and the questions take almost no time. Meaning before you even look at the questions you should have all the possible game boards figured out with all inferences. (This doesn't mean all the possible combinations, just the more broad possibilities. If you have a sequencing game where there are four slots and you have a piece that takes up three spots regardless, in a certain order for example there are only a certain amount of possible game boards that can exist for it.) This is something that naturally I was good at, whereas the other sections were harder for me. That would be my best advice, hope that helped remotely.

EDIT: I also forgot to mention that typically one of the games will be much harder than the other three. If you find yourself taking a far longer amount of time making the inferences and game boards, skip it and come back to that one last. Saving time is very important. Also in regards to the question types for LG's, idk the actual names of the types; do the ones that will create boards that work first. Like "If A is in slot 5, then what must be the order?" or "if C is not used in the sequence what is a possible sequence?" When you get an accurate board that works w/ all the rules, put a check next to it. You want to save these accurate game boards in case there is a question that asks you to replace a rule w/ another. "If the rule that H -> R is replaced by one of these, which would have the same effect?" Those questions are gimmies if you do this. Because if you have a build up of boards that you know work w/ all the rules, the correct answer for those questions will work w/ those boards you know work. (If that makes sense) I feel like it is kind of hard to explain this w/o doing so visually, but if you watch the explanations of enough LG's in the course you will understand what I am saying. GOOD LUCK