I've worked with keywords with SV of 2000-5000/mo before. Two years back, i could rank them just with guest posts, PBNs or expired web 2.0 links.
But after several Algo updates of this year, I don't think it'll work the same way anymore. Specially, when the keywords are of buying intent.
To me, I'd rather try these-
- Supporting high competitive content with tons of cluster contents. i.e. informative articles, single product reviews, brand reviews, Vs. reviews etc.
- Driving a good number of social traffics before organic ones.
- Do some natural link building from extremely niche-relevant blogs.
- Using a mix of anchor text types while link building or internal linking.
There can be many more points to be added on the list. But i think these are the preliminary ones.