After I beat the Episode Ardyn DLC for the first time, I'll be replaying FFXV, with all four DLC Episodes in order with the FFXIV collab, but without Kingsglaive and Brotherhood, as those things are not needed in my eyes due to their problems, sometime in early April. Here's how thing'll shape up, currently.:
Episode: Ardyn Prologue Anime
Episode: Ardyn (DLC): The anime for this and this DLC Episode would serve as a 'prologue' of sorts for the game for me.
Chapters 1-8; I may try to get Ultima Blade by Chapter 3, and get the Scepter of The Pious by Chapter 6 while driving Iris to Cape Caem.
Episode: Gladiolus: I would play this DLC in Chapter 8 at a campfire in Leide or Duscae.
Royal Arm Hunting: I will collect the rest of the Royal Arms to be found in Lucis before heading off to Altissia.
FFXIV Collab/Adventurer From Another World: Will be doing this right after collecting al of the remaining Royal Arms in Lucis and before Altissia.
Chapter 9 and Episode Ignis: I would play Episode: Ignis right after Chapter 9 on Chapter 10, except the credits and final cutscene after the credits.
Chapters 10-13
Episode: Prompto: I would play this at when I arrive in Tenebrae in Chapter 12, except credits, but will play the final scene at a bunk bed in Chapter 13.)
Final Fantasy XV: Comrades: I will play the scene where Noctis meets up with the Glaives and Gentiana as soon as I reach Galdin Quay, and play the scene where Noctis and his friends are lounging on the couch in Hammerhead as soon as he arrives there, all in Chapter 14.)
Chapter 14 with Royal Pack; I will watch the final scene from Episode Ignis as soon as I arrive in Insomnia City Ruins, then I will return to the past to get the Founder King’s Sigil, and return to the present, and continue from there.