It depends on "what are good at"? I look each subject's notes and here is my opinion
- FRM (mainly calculation base and it would be easy if you are good at it)
- GSL (lots of help from joining study groups in this forum, and the exam cases will release beforehand). It would be easy if you can obtain some previous exam questions (case studies) with sample answers.
- Audit (mainly theoretical base and it would be easy if you enjoy reading)