Another suggestion from me again... (Yea I know this idea will never ever get implemented)...

In this missions, gears are provided by the game. We can either play as single player or multiplayer mode.

Examples:

1.) A mission where we play as an owlite. This mission will cover the events on what happend between the owlites and the spookats and how the owlites got elked by spookats. (they probably died cuz their owlite wand is crap)
In this mission, our gear is provided by the game (A full-chaos set, an owlite wand, grey owlite shield, and ofc owlite costume and illuminating ward shield costume), trinkets are also provided. We're not alone in this mission, we got owlite allies does actually deals dmg.

2.) A mission that covers the events on Almirian Kingdom (On how vanaduke and the Citadel became what they are now).
I think we get to play here as one of the almirian soldier. The map would be similar to FSC, except that it's not surrounded/engulfed by shadow flames.
We also have AI allies that behaves like a mecha knight in this mission.

3.) A mission on how the knights got elked on the mission "The rotting metropolis". (We saw corpses on the last depth of this mission). In this mission, we get to play as one of those knights with a crappy 3* gear. We also have allies here, except they actually deal dmg unlike those trash misfits on rescue prestige missions.

4.) A mission that covers the past events between Seerus VS Herex (Members of the crimson order not allies). In this mission, we are gonna play as Warmaster Seerus and the enemies would be Herex' minions (constructs/gremlins). Ofc our weapons would be WMRH and Dark retribution bomb. We also have ally gremlins here.

5.) A mission that we play as Herex antagonizing the knights (including how he stole the artifact). Our main weapon would be a dread venom striker (reskined as green saw blades). The shield we'll use would be similar to the recon shield from LD. Sprite skills are replaced by Herex' attack moves (Like his orbiting saw blades, saw blade throw, and etc.).

6.) A mission where we play as a celestial knight (We're gonna use an orbit gun, celestial saber, and celestial shield here ofc.)
Our enemies would be aliens? (Reskined gremlins)