Athena any good?

+Sod is ideal and I personally suggest -Res most, as she is the second fastest unit in the entire game after Lon'Que and she works great as a Desperation sword unit. Fury or L&D works wonderfully as well.

She is fast and can do a lot of damage but frankly just being a fast sword is no longer enough when you have units like Ryoma, Ike, B!Roy. I regret merging her to +2 during her banner and wish I would have just kept her around for the Wo Dao+, at least for Olivia.

Regarding your IVs, keep the +Spd and use the other one as SI fodder.

My only issue with Athena is her HP Honestly. Even with neutral attack you can throw Death blow 3 on her and she hits 50 attack while attacking. Her defensive stats aren't too bad she's backwards Karel.. He has too much HP and not enough other stats she her too little HP. Offensively with a Spd+ IV you can throw swift sparrow on her and she'll do you justice that's what mines is running but I rolled mines during her focus so I was more hyped about her back then. But yeah she's not bad Wao Do and a form of death/darting blow makes her a pretty solid red sword unit she comes with desperation so that's a plus as well. I run her with a dancer and she's terror once she's hit (because of her horrible HP) If you have a lot of lords as I do you won't find yourself using her much. If not she's in a tier under Red Lucina/Marth but above Lon'Qu/Narrve/Karel so lower high tier upper middle ish.

She's lowkey godlike, and pretty much only needs Desperation or Vantage. I remember when I got my 5* +Def one, and I automatically realised just how good she is.