obviously build links to your blog posts, in a tough niche like "web design" I am willing to bet that the sales and traffic will come faster from your blog posts than from your services pages when you're a newcomer to the industry (if you've targeted the right keywords that is, otherwise you'll still struggle ranking the blog posts too)...
Also, don't point ALL of your backlinks to your blog posts. As a matter of fact, save most of them for your homepage and for 3-4 other important (usually category / service / main silo) pages, as authority is the name of the game in SEO nowadays, and the higher authority your site has the easier you will rank even for keywords you don't target. And to build up your domain's authority you need to point the strongest backlinks you can get to your homepage....
Now, depending on which type of links you get you might get away with some tricks. Like, for example...
- if you're buying quality PBNs (which you should do as these are very important for competitive niches like "web design") point them all to your homepage... ok, maybe not all of them. But point most of them to your homepage, and some of them to other important main pages.
For example, if you buy / build / acquire 10 quality PBN links and you have 3 important (category / silo) pages on your site whose authority you wish to boost, point 7 of the PBNs to the homepage and the other 3 to each one of the 3 main category / silo pages...
Same thing you can do with niche edits / link insertions...
But if you're building web 2.0s, guest posts, article directories, etc (although, article directories are considered spam nowadays so I wouldn't recommend you get article directory links... not as your tier 1 links anyway), you can insert 2-3 links into each article, and this is where you can capitalize on this benefit of guest posting / web 2.0s by linking from within each guest post / web 2.0 once to the homepage, and once to either a relevant blog post, or to a main category / silo page, or to both (in case that 3 links are allowed per post)....