[x] Tell Nadia that that's the plan. Because these aren't your grief seeds. Every magical girl deserves a good life. Thank her for believing and helping you. You will fix this.
[x] Call Rin and give a heads-up.
[x] Offload a chunk of grief to Kyubey. Not all, but you don't want to be threatening.
-[x] Don't let him disturb Mami.
[x] On the flight over, warn Sayaka that you're... not on such good terms with this group. Quick recap and explanation.
[x] Go to the Sendai Group
-[x] Try to be friendly. Ask how everybody is.
-[x] Cleanse, refresh their Grief Seeds.
-[x] Offer a Clear Seed. Usual conditions, warnings, and instructions.
--[x] Subtly(?) express a hope that, if everybody has one, nobody will have to fight any more.
-[x] Ask about Akiko.