Reunited Arcangel and De La Ghetto spice up reggaeton, but sizzle's missing

Two seems to be the magic number in reggaeton -- just look at the guys who trade turns on the charts: Jowell and Randy, Alexis and Fido and Zion and Lennox.Why the package deals? The better to create that layered, battle-style sound that works so well over thundering beats, as newly reunited duo Arcangel and De La Ghetto proved during a sweltering set Saturday night at Hyattsville's CocoCabana.