Oh. Lowering the Attack helps out my teammates as well, but I see what you mean.
@Moydow
Opossum
redfeatherraven
( Asking the FE lords to help me )
What is better on Ayra, Threaten Speed or Threaten Attack?
Probably still Threaten Speed.
In addition to helping Ayra double more, it also makes the opponents double less (if they're not relying on a skill to do so).
Let's say you've got a mage coming at Hector with
just enough Spd to double him, and 35 Atk.
With Threaten Atk he takes 30 twice, and is dead. With Threaten Speed he takes 35 once, and lives - and the mage eats a big bowl of Armads for the trouble.
Doesn't help B!Lyn or Ayra on defense - they were unlikely to be doubled anyway - but it
does help them on offense, letting them double more enemies.
Lastly, raising Atk is pretty commonplace, but raising Spd is usually not unless it's part of a package deal like Hone or Goad skills. So there's less chance of Threaten Speed being undone or made irrelevant.
Also is Ares better than Hector?
Consulted my magic 8-ball.
It said "Cannot predict now."