Questions about tier1 and tier2 (wep 2.0)

I am using (Web 2.0) as Tier 1. Link is exploding on Tier 2. What tier 2 is suitable for web 2.0 tier 1?
Forum Profile?Web Profile?Social Profile?URL Shorter?Wiki?
Which ones should I use mainly for Tier 2 to explode the link so that link juice can be delivered?
I use both Ranker X and seo Autopilot.
(For reference, tier1 link indexing is uses, both Omegaindexer and Speedlink.)

How about some PBN links in the Tier 2?