What wrong with he Burden of the Father (Savage)?

[CyrilLucifer]

Oh God, who wants to do A4S in DF?

[OwlBlackX]

Oh God, who wants to do A4S in DF?

Is it VERY hard?

[Jynx]

Is it VERY hard?

The fact that you ask. Tells anyone who dares try this why to avoid it.

You can't just go into savage blind with a unknown party makeup.

[Ibi]

Is it VERY hard?

It's not terrible, especially with 15% echo and i220+ equipment, but there are several mechanics that require precise coordination.

There are adds that spawn from the third phase onwards that require some fairly specific management; if even one of them isn't picked up almost immediately, it will likely result in an instant raid wipe.

There are a couple of mechanics in the final phase that not only require specific management, the most common strategy is to take advantage of server ticks and such to effectively allow people to take fatal damage twice within a short window of time. Again, if even one person involved fails to execute it correctly, it will likely result in an instant raid wipe.

[Bourne_Endeavor]

Is it VERY hard?

In its heyday, A4S was the hardest fight in the game by a country mile. Nowadays it's doable without too much worry, provided you have Echo and at least 220 gear. It's apparently a very boring fight though, so few people are going to do it in DF. No offense, but the fact you're asking this says you aren't quite ready for Savage content. These fights are extremely mechanic heavy and demand a lot from the raid group, even if you're overgeared.

[FoxyAreku]

I don't know why you would want to do anything in duty finder except dungeons and story mode trials. You're just asking for a headache....

[Selli]

Is it VERY hard?

To put it simply, this is how SE ranks fights.

Normal > (Hard) > (Extreme) > (Savage)

Savage fights are intended to be harder than extreme primals.