Do you run the daily 2 type manju missions?
They are a great way to run out of gold while getting manju.
Grinding something that drops the 80 Stamina Secret Garden Quest will get you Manju and Gold (Stage 12 maps, Event or Reissue event that drops that stage).
It has 10 soul gems on it too on DMM but they just added that recently so don't expect that for about a year or so.

I am in danger of running out on DMM because I keep getting units that are great if bloomed but underwhelming to downright bad before that.

I have been running those missions recently. Having girls of all types to lvl makes them well worth the stam.
Now that it's over tho I think i'll grind the event map 8 since it has a very high chance of that secret garden.

That feeling when you've got the gems, but don't have the dosh.

Still have about 10 girls left to evolve. Reeeeeeeeeeeee

First 2 steps of the Burning Bush Gatcha were too good to pass up.... got another new gold girl from the second step so the grind of manyu / gold continues for the foreseeable future.