Since I've been doing those daily Devil's Dream hunts, here are my thoughts on them!
Lucifer Castle, Basement Laboratory
2 Corrupt Elminor ~ Has a one hour respawn timer, takes me about 18 minutes to kill, if someone kites, otherwise, he runs away!
7 King Fordoi ~ Roughly eight hour respawn, takes less than three minutes each to kill
7 King Vordoi ~ Same as King Fordoi
Lucifer, Secret Garden
30 King Gehocos ~ Can usually get them right at the entrance, 30 is quite a bit to kill though
Lucifer, Moonlight Garden
30 Gahbirus ~ Not too bad, but again, 30 is numerous
30 Corrupt Gimlet ~ These guys whip me sometimes!
70 Hornets ~ These are the fastest to finish, provided they don't sting you to death first
50 Great Mandradora ~ The easiest to kill, though watch out for their puffs of poison, 50 can take awhile