I have used MATE for all my FSA exams (including recent fail of fall 2020 SPC).
for best results I have 1: At least skimmed actual source material, 2: blindly read through Mate manual at full speed, 3: Re-read Mate Manual, but this time creating my own outline- this is by far the hardest and more helpful part. This step alone can be 4-6 weeks. The goal is to have a ~25 page outline of all topics that covers 90% of likely exam questions. 4: do practice problems, referencing the Mate manual and updating my own summary.
for the fall sitting I only had 5 weeks. I was able to read the Mate manual and create my own outline based on it. But I only had 3 days to work practice problems and review my outline in front of the exam. I like having 3+ weeks to do this.
I used to use ASM manuals. I always just like to read, understand, practice; everyone solo.
I know others that love TIA and have had success with it. they like to have some one explain the concept as opposed to trying to decipher pages of text. Id say of the others I know taking exams, ~75% are using TIA.
My method kinda works for me. With the key being efficient use of study time. I have wife, kids, house, job, etc. I dont have 300 hours to study for a sitting. For Spring20 FVA, I only got like 50 hours in. I took SPC in the fall first attempt with ~30 study hours. So I need a method that allows me to process the material to memory asap.