This is Agrarian Skies, current release.

Admin of server, and BF of OP. Ask him to confirm IDGAF.

On his island:

-Spawn house in all of its original glory

-1 igneous extruder with 5 item ducts sending cobble into 4 crucibles. Lava is being pumped out into a magmatic dynamo using fluiducts. Deconstructing this entire set up does nothing.

-A small, non-automated farm. some wheat, some sugar cane, some black berries, one soybean. There is water next to it(about 5 source blocks)

-An animal pen. 10 animals in it. Removing them does nothing. Pen is made of vanilla minecraft fences.

-Some barrels with water in them. Emptying/removing them does nothing.

-A Smeltery with some melted metals in it. Not automated.

-A highoven with nothing in it. Not automated.

-A 3x3x3 big reactor. It is turned off atm. power is being pumped out with leadstone energy conduit into 1 pulverizer and 2 redstone furnaces. They are not running atm.

-An oak sieve with 3 autonomous activators attached. The sieve is not sieveing anything atm, and removing the activators changes nothing. Above this is a vacuum hopper and a double chest. 2 itemducts are attached to the chest, along with two trash cans.

-There is a carpenter and a squeezer, neither are doing anything atm. There is also a vanilla furnace.

-There is a research table and arcane worktable, 6 golden chests with random stuff in them, a blood altar with a small ring of 8 runes around it(first upgrade available), and a small amount of blood in it.

-There is 4 endstone with 4 ender lillies growing on it.

-There is an alchemic chemistry set with nothing in it other than an apprentice blood orb.

-A couple golden lanterns

-A bed, a radio from openblocks(decoration only, nothing set up in it), a reinforced chest, crafting table, tinkers' construct stencil table/tool station/part builder.

-A small AE system.(And I mean small, 1 controller, 1 drive with a 1k storage cell inside, 1 crafting monitor. That's it. It is also out of power and not doing anything atm anyway) All that is inside is a quartz cutting knife randomly.

-A QDS and 3 stone barrels.

-Some mycelium, 2 barrels of witch water and 2 moss stone. Some limestone(4 blocks-ish)

-1 chunk loader

-1 Presser

-1 aura node on roof(the one that exists there when the map is loaded)

-A couple crafting tables and vanilla chests(one has an energy cell inside, the other has some cobble stone)

-another trash can.

The island consists of the default island build plus some cobble/wood logs/wood planks/vanilla fence.

That's everything on his island. My island consists of 1000x this, and is running 24/7 in 100% automation. Yet, no lag what so ever on my island, but choppy game play on his island.