The only issue with Planeswalker Party is that each opponent can see your strategy as it's being played, which might rankle the opposition into ganging up on you
However, you could feasibly upgrade this deck into something thats much stronger as there are some really strong pieces here
I think Blood Artist is a little unlucky these days, in that its been all but superseded by Cruel Celebrant and Zulaport Cutthroat, but itll always have a place in our hearts as the starving artist that can take down a table
The precon already came with a few sac outlets and payoffs, all limited by either not being free or having to tap down, limiting their use per turn
Luckily, Princess Twilight Sparkle can make every player sorry, everypony a winner
Thus ends our really long story