+Atk -Spd Azura

Well, She Isn't THAT bad,You can Give Her
Slaying Lance+(Atk)
Sing
Astra
Life And Death/Fury 3
Wings Of Mercy/Escape Route/Desperation 3
Hone Atk
Flexible(S)

It's a Quick Made Build And The Only Things You Need Is A Little Patience For Sothe(If You Don't Have One)

EDIT:Glimmer Or Moon Bow Should Work To

Azura's a good singer for CC as her Sapphire Lance means she can sing and counter any sword with little fear. With -Spd she may need swordbreaker to ORKO but otherwise she can run the classic dancer set of Moonbow, Fury, Wings of Mercy, Spur/Hone.

Well, it never hurts to have more dancers/singers, so definitely use her even if it's just for the occasional chain challenge/squad assault/tempest trial.
-spd is really really bad though since she'll get doubled a lot, but I would give her a budget build (Fury 2/3, WoM3, some support C skill, Moonbow) since she really isn't supposed to see a lot of combat anyway. The good thing is that because she doesn't have any great skills to fodder off, you can just go ahead and build her until you get a better version of her so you can safely merge them.

Azura is a great unit, the reason most people are unexcited about her on this banner is additional copies won't do much for you.

For a low investment build, add Moonbow and Swordbreaker and she can take most swords on in addition to having her C/Seal slots open for buffs. To become even more fearsome against swords, swap out Sapphire Lance for Harmonic Lance and grab Triangle Adept for the A slot.

She can run Wings of Mercy but any dancer can do that.

Doesn't hurt to have an extra. If you want to be very lazy, just get her to level 40 and no additional investment. I think it's good to give her wings of mercy and a hone buff though.