My opinion is to leave link dumps alone. By providing solid content and working on the quality of your site you can grow organic traffic from Google and the other search engines reliably.
The challenge with link dumps are the link neighbourhoods. It's possible someone in the neighbourhood will get defined as spammy and then everyone is affected.
Even if the links included as part of the dump are relevant and above board at the time, it's possible the other site might try something else out and then your site can be affected.
Instead, encourage your site visitors to link to your content via their social media accounts and share. Those are more powerful links and can build your traffic via search and social at the same time:
