In the WP:Sockpuppet investigations/Troubles/Archive (which you cited above), User:Brandon suggested the following range blocks on 31 October, 2009.
99.135.168.0/21
99.141.240.0/20
99.142.0.0/20
99.144.240.0/20 
These were blocked for three months, but the blocks expired. Do you think that another three months would be worthwhile?