Originally Posted by
Goddik
Your playstyle should be control throughout most of the games. All of your hate is build to set up a temporary window in which your opponent has no resources available. Dropping goyfs on the table prematurely is in most matchups rookie mistake nr1.
My experience with Jace is also that he sucks in maindeck games where you don't want 4 lands on the table (i.e, actively brainstorm them away) and try to finish games by beats because your late game power just isn't all that hardcore. Postboard he is great against most things because your answers are better and you can play more of a pure control game plan, hence why i board him in in like 70% of my matchups but don't main him.
It is important to distinguish between old-school team america and the new-age lists with confidant. The new age lists are not tempo decks, they are control decks and as such are much better suited to run Jace. In fact if you are running confidants i would certainly run at least 2 jace main, maybe even 3.