All of the maps require awakened units (Not necessarily a full team. But it can help). A maxed black unit would fall short, as well. The only two I have yet to do myself is spirit rescue and demon crystal. I'll likely do them when I build a team for those maps when I get around to it. As far as I'm concerned, the only reason to do G maps is for more gold on mondays (not sure if thursday daily has increased drop rate). Affection items and spirits can be obtained any time from challenge maps.
Pero pero ID 860997 Pie my girl for an add (1M non-event SED please)