My local meta used to be largely about 'caster assassination, but it has shifted with the newer sets of tournament rules. Those are now used, and the scenarios are far more prominent paths to victory (especially at the 50 point level).
At this point, games are largely won through scenario, with 'caster kill on the side.
Personally, I still prefer a 'caster kill force, and that's what I normally play, but I am now the oddball.