I have completed the 3 super badges required for the Platform Developer 2 certificate. I have cleared the exam too. 

Should I complete all the trailheads in the below link to get the certification or else  is it enough to get the 3 super badges. 

https://trailhead.salesforce.com/en/users/strailhead/trailmixes/prepare-for-your-salesforce-platform-developer-ii-credential