i only buy-in during the add-on break, take the add-on option. from this point on, the game plays like a freezeout since late registration is over, the field is reduced greatly (usually between 30-50% reduction), and i have a decent, but short, starting stack of 18.75 bbs, ~15 bbs after the break.
for time constraints and because i hate really long mtts, these games end fairly quickly. they only lasting 2-3 hours, at most, after my buy-in to 1st place. obviously, they end a lot faster if i bust out early.