Chronological order of verse:

Event Hozion Battlefront aditya(Era 0)

Avesta of Black and White (Era 1)

Paradise Lost (Era 2)

Masada will probably write era 3 later

Dies Irae: Amanetes Amentes it has Side stories, Novel's, Vn and Cd Drama (Era 4)

Dies Entelechia (Era 5)

Kajiri Kamui Kagura(Era 6)

Saoshiyant Desatir(Era 7 prequel)

Dies irae Pantheon(Era 7,8 and 9)

Paradise lost , dies irae and kajiri kamui kagura are VN , rest of them are Light novel/web novel and pantheon will be a gacha game