Toffoli, Bernier, and a pick is not getting you a top 2 pick.
The rest of those guys are just filler and worth very little. The only one with value is Lewis, and he is worth far more to the kings than other teams.
If you want a top 2 pick, it's going to be more like Voynov + Toffolli + 1st. Unless you are already drafting very high and just want to move up a spot or two, top picks are never worth what they cost. The thing about top draft picks is if they are completely no-brainer dominant players, the pick is never traded. The more risky guys still garner a ridiculous return.
Not sure why the Kings would do this anyways, that's a rebuilding team move.