How to double organic traffic in one year?

My boss has given me a tough target of doubling organic traffic within one year. The domain has a good domain authority, but my product vertical has poor topical authority. We have about 100 blog posts, written over past 4-5 years for my vertical.

I am planning to revamp existing blog posts while having my team of writers create new blog posts. But I am also looking for more suggestions and ideas. What should my content marketing strategy be?