So which old content i can do unsync?

[Jojoya]

They are relevant the expansion/patch that were design for. Later they are irrelevant. Mythic in wow is the same but they give you special achievement when content is relevant. In the later expansions you cannot get that achievement so i do not see it being about challenge.

This is not true in the case of Ultimate. As Rongway said, Ultimate was designed specifically for players seeking challenge and they were told that SE would do their best to ensure they always remained a challenge by always requiring them to be level-synced and ilvl-synced. Job changes are not designed to make Ultimate easier and only those who do them can say if job changes have accomplished that or if they are now effectively easier because there is a wealth of information about how to do the mechanics available online for later participants to study.

This is not WoW. As a former WoW player myself, I'm glad it isn't. While it's natural to judge the game by our experiences in WoW, don't make the mistake of thinking it's going to be exactly like WoW with the same motivations behind the content design.

I'm sorry you don't like the answers you are being given but they are nonetheless the truth. If you want those shiny weapons and Legend titles, you're going to have to join a party and progress them synced. Many players are continuing to do exactly that.

[Astrahime]

I can do the hardest raids solo if I have enough DPS and game mechanics allow it.
So why i can't do the ultimate raids unsynced.

From the wiki on The Weapon's Refrain (Ultimate):

The boss will begin with four large pillars dropping at the cardinals of the arena and dealing proximity damage. Players should stack in the center to shield and heal through this. The boss will summon 6 Magitek Bits around the arena. They will begin slow-casting Self Destruct which will wipe the party. These can only be defeated in time by using the level three caster Limit Break. This should only be used by the caster with the Beyond Limits buff. After using this, the Limit Gauge will refill. Players should also be attacking the bits to ensure the Limit Break kills them all. After they are destroyed, Lahabrea will spawn and immediately cast Blight, which will reduce all players HP to 1, inflict Doom which lasts for 8 seconds, and Down for the Count, which lasts for 4 seconds. The only way to survive this is by using the healer level 3 Limit Break. Again, make sure the healer with Beyond Limits uses the Limit Break. The boss will become targetable and begin casting Dark IV, which will hit for max damage. Use the level 3 melee Limit Break to defeat him while other players attack the boss to ensure it dies. After Lahabrea is defeated, The Ultima Weapon will spawn and cast Ultima, an attack that must be mitigated via shields, cooldowns, and a level 3 tank Limit Break.

Please tell me how you're going to get through all of this without a full party.

Limit Breaks are only usable in a party environment. The entire party shares the same limit break gauge, with each party in an Alliance raid having its own meter. There are 3 levels of limit breaks (commonly abbreviated LB1, LB2, and LB3): the 1st level can be used in a party with 4 or more members, the 2nd level needs a full party of 8 members, with an additional level being granted while fighting a boss.

So you don't have ANY limit breaks accessible to you, and even if you did you wouldn't be able to use multiple different types.

[CvClone]

i think it's about , ultimate raids weapons/titles , as you can see
people do old ultimate for the titles/weapons , at least most of the players who do it
so having it unsync will take away the difficulty part and will make this rewards a normal thing , and that is what SE don't want to be , and you can see that in the savage raids , you can solo o4s as a tank
let alone Ultimate raids is made for the sake of team work , if 1 person mess up in some part , it's a wipe.

[Elkanah]

.

Wow this. Wow that. Go back to WoW then lmao.

[Kyllandra]

I just have to. I'm so fed up! I want to be able to solo old content including the previous expansion (Endwalker). There is no logical reason why this can't be done. Just nuke the HP bar OR make the tard bonus super strong if the content is un-synched or something. ANYTHING! How hard is it to go back and just switch a couple of numbers around???? PLEASE SQUARE ENIX, FOR THE LOVE OF ALL THE GODS, change this! PLEASE PLEASE PLEASE!!! We pay 15+max retainer subs a month and you can't change this???? Let us enjoy the content we missed and prefer to do alone!

[Kyllandra]

They can't keep ultimates as they are. I do not care. Let that be their tryhard portion of the game. Fantastics! But savage and ex from previous expansions? Just come on!! Stop gating old ass content!