well i have tried 100+ types of link tier strategies and i can say one thing that if you are using 301 redirects to web 2.0's (which have unique content) it will decrease the effect (link juice) although it is the best approach for authority site link building and you might need to throw some more 301 redirects on these web 2.0's btw you didnt mention your keyword competition
[TABLE="class: sped-a, width: 811"]
[TR="class: spYb-x sprc-b spYb-o"]
[TD="class: spYb-g spYb-y spYb-p, align: right"]3,600
[/TD]
[TD="class: spYb-g spYb-y spYb-p, align: left"]Low
[/TD]
[/TR]
[/TABLE]
[TABLE="class: sped-a, width: 811"]
[TR="class: spYb-h sprc-b spYb-o"]
[TD="class: spYb-g spYb-i spYb-p, align: right"]1,600
[/TD]
[TD="class: spYb-g spYb-i spYb-p, align: left"]High
[/TD]
[/TR]
[/TABLE]
[TABLE="class: sped-a, width: 811"]
[TR="class: spYb-x sprc-b spYb-o"]
[TD="class: spYb-g spYb-y spYb-p, align: right"]590
[/TD]
[TD="class: spYb-g spYb-y spYb-p, align: left"]High
[/TD]
[TD="class: spYb-g spYb-y spYb-p, align: right"]
[/TD]
[/TR]
[/TABLE]