Super Efficient, Multi-Mob Grinder + Farm Complex

Ever wanted mob farms? How about efficient ones? How about mob grinders that give you fast exp as well as items? How about many efficient, high speed, high-return mob grinders and farms all in one? If that's what you're looking for, here it is!

This is an unfinished map that currently contains:
--- Zombie, zombie pigman, and skeleton grinder ALL IN ONE (super efficient)
--- Creeper grinder + record disk farm (really efficient)
--- Iron golem farm (Uber high return)
--- Pig, cow, mooshroom, and sheep farm ALL IN ONE + COOKED MEAT (redstone, but efficient)

Future:
--- Spider + cave spider grinder
--- Efficient farms (sugar cane, melon, etc.)
--- YOUR IDEA HERE

If you like this map and where it is going, please diamond it and favorite it! Thanks! Comments are also welcome!

~bobbychan193