Chaining is mostly done in 0.0, doing it in higher sec is possible but quite pointless. It is usually not done in anything above 0.0 because in higher sec theres usually people that go through random systems killing rats, and 1 stupid person can mess up your entire day’s work on getting a system wide farm going.
But, I guess you could find a remote 0.1-0.3 system people may not normally goto.
EVE ISK price
So heres how you chain:
First off find a system that only you, or your buds are likely to hunt in and make sure they all understand whats going on. If you don’t make sure they understand what to kill and what not to kill, its gonna end up in a mess.
Once you have a system you want to farm, go through the belts. Rats in belts only spawn once you get to the belt, they aren’t persistant even though it may seem like they are. Once you, or anyone in the game gets within a certain range of the belt, rats spawn.
Once you have gone through all the belts go back to the top one and see what has spawned there, if nothing has yet, go to the next belt and give that belt a bit more time. Also, make sure you go down the list of belts and don’t just randomly go from belt to belt, it doesn’t affect the rat spawns, its just easier on you that way to remember what spawn is where.
Once you have a belt with rats in it, make an opinion on the rats. Judge their bounties compared to what you know can spawn there. ie: If you a spawn consisting of 3 battle cruisers ( @ maybe 250k EVE ISK each ) and 2 frigates (@ maybe 25k EVE ISK each), would you want that or would you rather have something better say 2 Battleships ( @ 1.2m EVE ISK each ) and 3 cruisers ( @ maybe 90k EVE ISK each ). If you would rather have a different spawn, completely kill off that spawn. Do not leave anything alive. Loot if you want to, or dont, it doesnt affect the spawn.
If you want to keep the spawn you found at that belt, kill all of the bigger things, ie: if you kept the spawn I mentioned above w/ the battlecruisers you would kill the battlecruisers and leave both frigates. You can kill 1 of the frigates, but I personally wouldn’t waste my time and just go on to the next belt.
If you were to have a spawn that consists of 3 battle ships and 2 cruisers. Kill the battleships and leave at least 1 cruiser.
Always leave at least 1 ship standing if you want to keep the spawn.
Do this through all the belts. Keep what spawns you like, kill off the ones you don’t. Eventually if you get lucky with your spawns, you can get a system of say 9 belts each with spawns of your liking. I have had a system where 5 of the belts had a spawn of 3x 1.8m battle ships, so me and my bud just went to each of the belts and killed the spawns except the frigs and then by the time we got to the 5th, the 1st was usually respawned.
However realize that if you farm, you have no chance what-so-ever to get an officer spawn. Unless you get lucky and when you kill off a spawn and it spawns. You cannot chain officiers, they wont respawn as the officier, but as a normal rat.
Although you cannot get an officier, you can get a faction ship. Ie: Dread Guristas / Dark Blood / etc.
You cannot chain them though, after you kill them, they will respawn as a normal rat. And what I mean by you can get them, is if you have a Blood Sage ( normal blood cruiser ) you kill and next time it respawns, it has a chance to respawn as a Dark Blood Sage (faction blood cruiser). However it will not ever respawn as an officier ( Officiers are named rats).