I have a top-heavy distribution. With 1st 1%> 2nd 1%> 3rd

I can understand why people might have a lower 2nd % and higher 1st/3rds ... but I think that there are two secrets to a top-heavy distribution:
1) Getting ITM with a good amount of chips
2) Playing a good heads-up game.

You can improve your heads-up game by playing 2-player SNGs. Getting ITM with a lot of chips is trickier--- it means playing a little looser early, having good post-flop skills, and very good bubble-play.

I don't think that JUST playing good on the bubble will get you a true top-heavy distribution.