Update: I've moved from #6 to #4 after doing what I said. For ease of reference, I'll label the digram you posted
A B C
D E F
.$G$.
D and F are raw backlinks (no anchor) to G. E links to D and F with my keywords. A xrumers F with keywords, B xrumers E with keywords, and C xrumers E with keywords. G is my money site.
I completed A, B, C and E via xrumer. I sent E, D, F to linklicious at 80links/day. Already, today, I'm bouncing between #4 and #6 and traffic is up a bit. I've done no other linkbuilding or modifications besides changing up some tags as I mentioned before, so it appears it's definitely helping.
To give you an idea of the amount of links I'm using, A, B, C are about 9k verified links (each, so ~27k total). D and F are 55 links each PR3-8. E consists of 8k total links to D and F, however, only 2.4k of those have anchor texts so I'm only counting the 2.4k (as a lot of xrumer profiles only have a space for your website as a URL, not a anchorable signature).
Will update again in a few days.
I'm testing this out on a site that's been stuck around the mid/bottom of page 1 for a while.
what I'm doing:
Ran SENuke profile module for high PR links to the root domain with the URL as the anchor; i.e. <a href="http://domain.com">http://domain.com</a>.
That resulted in 110 pr3-8 links.
I split that into two files of 55 links each.
Ran xrumer against those links with a link to each list, 2 backlinks per xrumer profile; one to list 1, one to list 2... i.e. an xrumer generated profile looks like:
<a href="random url from list 1">keyword</a> | <a href="random url from list 2">keyword</a>
Then I will run xrumer on those xrumer generated backlinks several times as well as an xrumer blast on each individual list.
I'll let you know how it treats my site. I'm currently at #6 for my main keyword today which i've been stuck at for a long time (highly competitive). One thing to note is a few days ago I re-did all of my tags and added a few bits of keyword rich content per page and have been bouncing around a little bit because of that, but on average it's stuck at #6.