Hey, thank you
I mainly followed the guidance on IRCC website, as you mentioned. So basically, here is what I submitted:
* my side: act as the representative & the host/sponsor for my parent's trip
- NOA 2021, T4, Employment letters & 3-month payslip for both me & my husband (he co-signed the application)
- our 4-month bank statements (showing stable income and savings), property paper in Canada
- birth certificate, PR card, driving license, marriage cert.
- signed letter of invitation
- signed letter of financial support
- letter of explanation (from me to the VO in my country)
- I also added a 1-page summary at the beginning of each pdf file to explain what I included in the file (you know we have to combine everything into one file, especially the financial proof - it can be hard to understand). This is just my way to organize my files. I hoped it would help the visa officer to follow easily and not miss anything.
* My father's side:
- 6-month bank statement showing my regular transfer and his savings (around CAD11k)
- property document under his name in his country.
- no other financial related docs since he doesn't have any income/job.
- upfront medical exam
You should also search in this forum for more detailed guidance, i.e., a post from someone who got their visa within 6 days. That post is very helpful!
Good luck