I didn't make it past our departmental round the first time I applied because I had no publications (I wasn't even considered at the university-level). Published a couple items and overhauled my application, and ended up getting a top CGS-D ranking. I think having 2-3 publications will improve your chances drastically. I have my fingers crossed for you.
Regarding the application itself, I recommend making sure that your research/application is aligned with their strategic plan and 16 Future Global Challenges (https://www.sshrc-crsh.gc.ca/funding-financement/merit_review-evaluation_du_merite/index-eng.aspx). Position yourself as someone who's on the beat about what challenges Canadians face, and clearly articulate how you're going to be a scholar that will help them meet these long-term goals through your specific brand of research.
I also don't agree with the idea of partitioning the discussion about the significance of proposed research into the 3rd or 4th paragraph (typically second page). In the successful applications I've seen, we've added that commentary into every single paragraph.
They've also updated their selection criteria, as to include service activities/volunteerism as a consideration to evaluate relevant experience and achievements. I recommend taking part in academic service activities, such as organizing a conference panel, putting together a symposium, or serve in your university's governance.
Best of luck, and feel free to DM me if you want more pointers .