Quote from logic_man:
As with many things that sound good in theory, the potential flaws will lie in the execution.
For example, how will you define "beaten down" sectors? Remember that a market can nearly always go down more than it has already.
It sounds somewhat like the "Dogs of the Dow" applied at the global level. Not that that is a bad thing because I think that strategy had a good run at beating the market, as I recall.
I guess overall, it could work, but you'd need to actually quantify some of your definitions and then test them on historical data.