@unregistered user
if you feel that saki will be critical in getting that completion reward then by all means get her Saki has her merits. I am not about to argue on that. I would have to agree with Tenhou on his stand on when to get Saki. I, for one wouldn't rush to get her but I am not a completely F2P player so my views might be a little skewed. Do what you feel is best for your team