GSA SER is building Tier 2 links but slowly. How do I increase link-building speed for Tier 3's

I am building Tier 2 links to existing Tier 1 links to my money site (Tier 1's were just "natural" backlinks that others have built to my site over the years). The project is going well, but it's building backlinks quite slowly (please see screenshot). Almost always fewer than 100 backlinks a day; sometimes only in the teens. So my questions:
1) Is it normal to build so few backlinks a day? I have to admit I only use 5 dedicated proxies from Buyproxies, (should I get 10 semi-dedicates ones instead? Or more?). How do I greatly increase the number of backlinks built a day?
2) I want to build Tier 3 links to my existing Tier 2 links. From what I know, Tier 3 should have far more backlinks than Tier 2's. How do I do this? I've unclicked the Indexer option for Tier 2. I can always click that and build hundreds a day. But is that wise? How do I increase the backlinks on Tier 3 vs Tier 2 otherwise?
Any help would be totally appreciated. Thank you!
Comments
Depending on your project settings, once your target site list has been processed, it won't make anymore links until it has new target sites to post to.
2. You either duplicate the T3 project multiple times or you use the scheduled posting settings to create additional accounts/posts on each site.
You will need to use links that get indexed in T2. Indexer links have very low indexing rates, which means the T3 links won't be able to do their job if the T2 link never gets indexed. Link juice doesn't flow through non-indexed links. Test it and see for yourself.