Avoid wheels. AVOID. Unless you intend to churn/burn of course. And I am not a fan of large multi-tiered building either. Especially if you are using ANY software to generate links.
Tiered, as in 1 T1 with 10 T2 with 300 T3 with 10,000 T4 is absolutely dead in my opinion. The loss of quality will follow you to your MS and ruin the whole thing. A quality T1 with dripped in high-quality T2 manual links and social signals is ok though in my uses.