Find My Monkey Dolls event is awful

Make sure you're at mobs close to your level. My main got 20 dolls in one hour at Mutant Ribbon Pigs, and my level 56 mule usually finds one monkey doll at each round of Treasure Map, which takes maybe 15-20 kills, at Toy Trojans (lv 57).

Also, try changing channels. Seems the monkey dolls behave somewhat like other rare drops, in that some channels drop a lot more than others.

Good luck.