Fury, TA, or Atk+3 on my Eirika?

I think Fury would boost her already impressive bulk and speed and make her a better tank. TA works with that kind of mediocre attack, but only if you can't plan on consistently running a sword check, as Eirika already checks red tomes just by shrugging off their hits (unless they run Swordbreaker or are a fast Celica. Still, if you get doubled with Fury you take the same damage as if you'd been doubled without it, but the 6 post-combat won't kill you.) Attack+3 isn't much help.