Finished the subjugation, now pondering what to do with Joy. Current blacks are AW99 Nanaly, AW99 Anya, AW1 Saki, CC80 Karma, CC80 Nagi and 50 Altia. Reluctant to use it on Saki since I will (eventually) be trying to CR her and unsure if I actually want to CC Altia due to the cost increase changing her ramp capabilities. Then again, she will most likely replace Katie, so the 3 UP more may not be such an issue.
Is it worth using Joy on any of those options, or should I keep her for a future event black?