Minimum item level for Heroic Dragonflight Aberrus raid?

I’m seeing a lot of different things regarding item level and the bare minimum it should be for dungeons, but I’m not getting a lot about Raids, especially not about Aberrus.

I only started raiding within recent months on the game, and currently my overall item level says it’s 418 (though it mentions smth about PvP so I’m not sure if it only applies to that or not, as I don’t do PvP), so I’m incredibly confused.

I’d be really grateful if someone could tell me the item level overall needed for heroic RAIDS on Aberrus! I’m in serious need of drake crests, and right now I’m only getting maybe one a day? If I’m lucky.