I'd run all Sensei's, Tops and then if you have open slots, fill in with Ponder. Honestly, Ponder isn't any better than Top when you are running a D-Day in the MD and 2 in the Board; in fact, it really puts you at a disadvantage due to the fact that it's a card good against only what you are already good against, i.e. aggro and etc like what you played against in the tourney. It makes no sense to run 3x D-Days and only 2x Top. Blue Cantrip piles are significantly more difficult to pull off as LED isn't an option prior to cantripping into your 5 card stack.

That's my opinion.

Pce,

--DC