Fastest place for 70-90 equips

Before BB I used to hunt those in a minidungeon in malaysia, though now with the delay on meteor shower and all other monsters dropping items of like mad I guess it's not that good of a place. They drop 60-80 though, IIRC.

I used to make about 20m in monster crystals in about 45min 2x drop there.
They even dropped esthers.