Amira or Jeanne?
Amira seems pretty dope and can boost my attack rate but Jeanne cones with a weapon I can actually use. Plus I'm sure her buffs/debunks will help a lot.
You will need both anyway, choose the one that makes the most immediate impact on what you need that you can't cover with your own classes or other characters.
The thing that makes Amira unique is that she builds ougi meter stupid fast for herself and her teammates as well as increase double and triple attack rates. Her demon mode ougi also shortens skill cool down times by a turn every time it is used. She is also immune to status effects in demon mode.
You will want her to get into demon mode as soon as possible and be in demon mode as long as possible in the duration of the battle.
Her con is that she doesn't get her cool down up and immunity until she is 5* limit break and hits level 90. And her final limit break requires you to solo a Proto Bahamut, so she will take time to get to her max potential but when she is she's one of your best characters period and she can do well in Dark teams as well, especially with Odin.
Jeanne on the other hand is very useful for her debuff and buff utility as well as the damage she can bring out of the party with her guaranteed turns of triple attack and attack buff and defense debuff.
She has more of an immediate impact if you need her skills and she doesn't require as much work since she is a 4 star character.
Jeanne is also a cuter SSR than Amira.
Depends on what you need now since you can ticket the other one later.
