Yes, I think Mind Wipe is overpowered. Jaina is a tremendous threat, and so with 1 or 2 uses of this Power, she would be nearly invulnerable to the majority of damage output from the opposing squad for the rest of the skirmish...and all this with a replaces-attacks ability. If she saves up the FP (not that hard when your opponent's main threat has been neutralized), she can do it twice, which could be devastating, especially considering that you can (and probably would) run Kyle JBM with her, who would remove the CE boosts that could otherwise make those enemies able to at least do a little bit of damage to her.
Forgetfulness 2 looks really good, though I think you do need to include an indicator of time; ie, Replaces Attacks, Only on this Character's Turn, etc. Or maybe just this: "Only usable when this character is attacked:"
It's like spending 2 FP for tremendous defensive ability vs melee figs (or adjacent shooters), which, from what I've heard, closely fits her character from the books. She was just deadly in close combat. It also works to limit the effectiveness (and possibly brokenness) of Riposte with Twin and Niman Mastery since she could either Riposte or Forget any attacks, but not do both.Riposte and Twin Attack is pretty nuts, especially when you have Niman Mastery active. "Sure, I'll take a hit for 20, and then dish 60 back to you."
Niman Style Mastery looks really good; it's a good step up for the Mastery level.
