How much item level we need for the new content?

[MistakeNot]

Hmmm i think the first SHB dungeons will be @375 ilvl. And for example running the Burn with low ilvl gear ... sorry but this sounds like hell especially for the healer and tank. I dont think gearing up to 380 is hard. But its just my opinion : whatever float your boat as long you are not a burden for the group.

Gearing up to i380 isn't hard as such. Just tedious and/or expensive.

Judging from the early parts of Stormblood and Heavensward, I expect the first ShB dungeon to drop i390 or i400 gear - depending on what level the dungeon is.
I also expect the early quests in ShB to give us i385 gear before we end up in any dungeon, so better gear than that will certainly not be needed going into ShB.