Powerful Prestige Classes from B&T and S&S

[turtle]

What prestige classes for wizards and rogues do you find to be the most powerful (or overpowered) in your campaign?

 

[hong]

I think you mean T&B (Tome and Blood). I think you'll probably also get better answers on the Rules forum.

IIRC, the following classes tend to be viewed as being on the powerful side. Whether this tips over to "overpowered" depends on the campaign and the player.

Arcane trickster
Bladesinger (updated version)
Dragon disciple
Elemental savant
Fatespinner
Mage of the arcane order
Mindbender

What's that, you say? No classes from S&S are powerful? That is correct.