How to Increase Domain Authority(DA) 15 to 30 DA in 2 Months?

I have a video listing site and at present i have 14 DA. Is it possible to get 30 DA in 2 months?
I am working on following methods,

• High Authority Social Bookmarking
• High Authority Directory Submissions
• Guest Blogging in niche sites
• Blog Comments
• Forum Comments
• High Authority Profile Links

Is it enough to get 30 DA in 2 months or do i need to do anything apart from above methods. Please suggest.

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submitted by /u/videosloving
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