Hello,
As I working for 10 years and run ad words, ad center and facebook ads over 100 campaigns, I have been worked also over 1000 SEO projects too, so sure about the better ROI,.
I can start the work just now, If you share your site, it would be better so I could have a look on web site.
For further detail may have a chat discussion too..
Best Regards
rkshpal