漠然置之

漠 = 氵 + 莫 : The desert (漠) is advancing into observatory's bathroom (o4), but Mozart (莫) and Mahatma Gandhi (m) are very unconcerned (漠) because they stockpiled a lot of water bottles (氵).

然 = 灬 + 肰 : Robinson Crusoe is grilling some dog meat on his BBQ in the anthill's kitchen, but it's hard to do it correctly because of all the animal rights activists. They think it's not right to grill dog meat.

置 = 直 + 罒 : James II of England (zh) decided to go straight edge (直) and installs (置) his new seat (置) in the space station's bathroom (Ø4). He's going to use a fishing net (罒) as a kind of spartan, straight-edge hammock.

之 = 丶 + Z : Mnemonic symbol: Sooo sleepy... "zZz" (the character looks like a "Z"). James II of England (zh) fell asleep in front of the space station (Ø1). He sleeps on a big petal leaf (丶), making loud "zZz" (之) sounds.