For quant I would suggest you see where you are at the moment:
Take a official mock and see your starting score
I for one had Q48, so I am focusing on doing questions from
egmat scholaranium,
gmat club tests and will later do official questions
I think GC tests are something that will open your brains. You’d learn that it is not the calculations or long methods that make the calculation tough but the reasoning.
GmatClub tests give you that.
If you are struggling with basics then joining any decent course that teaches from basics certain topics can be helpful.
TTP,
egmat or
magoosh whatever is more comfortable for you. You can take.
Egmat Word problems I don’t like. On hard level questions I think most test prep companies don’t do a great job. They make the problems long and calculation intensive to increase difficulty. For eg:
egmat word problems are so time taking that you cant solve them under 3.5-4mins. I am not kidding. So I would not stress too much about that part, and utilize the useful part from these courses, ie learn setting up fundamentals strong and getting into an habit of solving 31 questions at a strech. Trust me that is also another tall task.
GC tests do a super job when it comes to giving you an ultimate package. They are a tad bit harder but again taht difficulty promotes sharpening of individual’s reasoning.