>>114620175A three-part riddle all at once! You certainly aren't wasting any time, Riddler, but your cunning is no match for the reasoning of justice!
>bunch of baby puzzlesFor your three-part caper, you've chosen not one... not two... but three partners in crime, all indicated here! "Bunch," as in bananas, points directly to Gorilla Grodd, "baby" couldn't be anyone but Baby Doll, while "puzzles" indicates that you're pairing your intellect with the puzzling Cluemaster's!
>work up the difficulty"Work up" can have several meanings, and as your three-part theme continues, so too do the meanings of work up, which can be easily paired with your three criminal comrades! To work up an appetite (Grodd with the earlier "bunch" clue), to work up emotionally (Baby Doll as an actress), and to work up as in to develop a story (Cluemaster's depth of intellect). These are the keys to the three plots you have concocted with them, due to "difficulty" also meaning "trouble," as you and your associates intend to create!
>bore to deathAs my keen-eyed friend
>>114620403 deduced, bore also has multiple applications, three once again! To drill, to carry away, and to bring tedium! Gorilla Grodd will attempt to drill into the city's water supply, thereby eliminating its ability to sustainably grow food! However, you'll need a sizable distraction for a caper of this magnitude, and so Baby Doll with her acting prowess will fake several public stunts to get the populace in an emotional state, while Cluemaster will broadcast a series of mind-numbing televised puzzles for the more cerebral citizens! With the city risking death from starvation, you will sell them your own stockpiled resources, extorting Gotham for everything it owns!
However, with your plans exposed, I'll make sure that Gotham's families keep food on the table, while your four have only one destination: Arkhkam Asylum!
