Ayra or Karla?

So I'm wondering whose better on a team with

Nowi +3
(+spd -hp)
Lightning Breath+(SPD)
Aether
Steady Breath
Guard 3
Quick Riposte 3

M!Grima
(+Res -HP)
Expiration
Aether
Warding Breath
Vengeful Fighter(Yes i know they dont stack)
Distang Def 3

Sigurd +3
(+HP - RES)
Divine Tyrfing
Aether
Distant Counter
Crusader Ward
Close Def 3

The Ayra i would put is(Neutral)

Build:Slaying Edge DC Wrath

The Karla i would put is(+Spd -def)

Build:Vassal Blade DC Wrath