I know NMs and monsters are a little easier outside of Abyssea nowadays since a lot of them are old, but there are some really tough NMs outside of what we know as home to still be pretty tough. Some of these NMs need an alliance and sometimes the alliance can still wipe out.
I know this may never happen and most people probably wouldn't want it to happen either, but if there was any possibility to grab a brew in any region, dungeons, etc. whether it be with 200k IS, CP, or ANs, then what NM would you pick to brew down first?