What is current core content?

Can't seem to find this simple information anywhere but anyway.

What is currently in core content? I get Harvest is not in but what IS in ?

I ask because I enjoy SSF and it's easier to play in standard as there is no time limit on the league,

EDIT: Sorry - reading too fast, but fortunately Neo was paying better attention.

As far as which pieces are really important in both challenge and standard...

Delve for the Vorici recipes
Beasts for flask crafting
Syndicate for bench mods

There is more in the above, but the listed items are the only things that are really critical. The rest of the content can be played if you enjoy it or ignored if you don't.

Most past league except

Tempest (now only from prophecy and incursion)
Onslaught (as item mod, did not have Onslaught map mod)
Rampage (only as item mod)
Invasion (as prophecy or flask back event)
Warbands (axed by no roaming Warbands except using prophecy; bosses moved as map bosses)
Talisman (no recipe to upgrade Talismans; league boss now edited as map bosses)
Perandus (as zana mod and easter egg npc in Betrayal, boss mechanics as unique map and Ivory Tower Map)
Legacy (sorry no league stone)
Harbinger (as Zana map mod, sextant, Delve node)
Synthesis (ability to deterministic craft Synthesis implicit is axed, revised version as Harvest recipe axed, placing memory axed. End game memory became map)
Harvest

-----
While these leagues were modified as map mod or simplified

Beyond (map mod)
Bloodlines (map mod)
Torment (prophecy)
Nemesis (map mod)
Bestiary (simplified)


----
Stuff that did not need map mod and zana mod is like

Delve
Incursion
Betryal
Essence
Bestiary
Abyss
Legion
Blight
Metamorph
Prophecy
Essence
Breach
Delirium
Anarchy
Domination
Ambush

"

Rekt_that wrote:

https://pathofexile.gamepedia.com/League

Does not tell you the mechanics in Standard.

Thanks neohongkong for the useful info. Very helpful.