Two eva kilas will probably be fine too. At the max upgrade level, those daggers have just 1 dmg less than the Aluh Jamiya, although the Aluh also has more str and attack. With two of those daggers, you will also have a lot more evasion, but for abyssea use, it will probably be overkill to use two eva kilas when the rest of your gear is up to date and your skill is capped. At that point, you should probably use some other dagger instead of one of them.
Additionally, you should also consider maxing out str merits to increase your damage. Merit Haste Samba too, to get 10% haste when using it. That will speed up damage dealt, TP gain, and also make you skill up those daggers faster.
Also, which atmas are you using, and do you have evisceration unlocked? Exactly how high are your dagger and evasion skills?