Jiko is wonderful -- the food is great, the ambiance is different than any other signature restaurant -- very cool place.
Narcossees - Did not like. Thought it was rather dull.
Citricos --- Never have been! It's one of our ADRs this year --- but I have heard amazing things about it, and would rank it high on your list of options.
I guess your choice could come down to ease of transportation - so I would say, whichever is easier to get to, Jiko or Citricos ... and go that route. I do not think you'd be dissapointed either way. Plus, check out the menus. That helps. The only thing about Jiko is - if you aren't staying at AKL, it's a great excuse to see a fantastic hotel -- and have a GREAT meal.