"Knights compared:
Soul's, Phanto's.
Visual details:
1 bug report: neck seam addendum. 1 bug report: Wing toggle toggles out inner wings too. 3: Wagon thrusters should replade normal ones. 4: Toggling right-Knight to blue, no effect. 5: Basic posing transition. 6: Wagon helmet texture tearing (similar to that on Soul's Promethean weaponry). 7: Bodygroup list of Soul's Knight. 8: Bodygroup list of Phanto's Knight.
Intent:
Suggesting to copy-over the variants for bodygrouping.
Reason:
With more options, the Knights' customization becomes more flexible. This has been witnessed in Soul's rendition of the H4 Sangheili.
Execution:
Somehow, by grabbing the variants' respective parts, and also-somehow adjusting them to be able to work with the Knight on the left.
Outcome:
Incredibly modifiable Promethean Knight, which can create the following types:
Knight, weapons: Suppressor, Light Rifle, Scattershot.
Knight Marksman (normal Knight + Lancer sword + Lancer Outer wings, if that's even possible; no Lancer center wing), weapons: Light Rifle, Reign-skin Carbine.
Knight Lancer, weaoins: Light Rifle, Binary Rifle.

Knight Raider (Wagon thrusters, Lancer inner wings, normal outer wings, Lancer sword, Wagon lower helm, Lancer upper helm), weapons: Scattershot, Binary Rifle, Dual-Boltshot (by small hands) with Suppressor.
Knight Bannerman (normal Knight, Battlewagon central wing, Commander sword, light-spikes ON), weapons: Light Rifle, Scattershot.
Knight Noble (normal Knight, Commander sword, Wagon outer wings), weapons: Suppressor, Light Rifle, Scattershot. Might carry a Boltshot in-hand.

Knight Templar (Wagon thrusters, normal Knight + Commander sword + Wagon upper helm), weapons: Suppressor, Scattershot, Binary Rifle, Incineration Cannon.
Knight Battlewagon, weapons: Scattershot, Binary Rifle, Incineration Cannon.

Fire-Archon (Wagon thrusters, wagon outer wings, Lancer inner wings, normal central wing, Lancer sword?, Wagon lower helm), weapons: Customized Didact-skin Suppressor, Incineration Cannon.
Ajay 'Blue Knight' (Lancer central wing, normal Knight), weapons: Experimental 'Void' Storm Rifle, Sentinel Light Rifle / Blue Star's Gaze?.

Knight Exemplar (Wagon thrusters, Wagon outer wings, Lancer inner wings, Wagon central wing, Wagon blade, Lancer upper helm, normal Knight), weapons: Binary Rifle, Incineration Cannon; can wield in small hands: Suppressor, Light Rifle; Exemplar reference image would be http://i.imgur.com/VbvhpP7.png, where the Knight began to invade Source, but it took about a year to get here.

The custom variants I suggested (Marksman, Raider, Bannerman (named Halo 5 type but no visual variance), Noble (named Halo 5 type but no visual variance), Templar, Exemplar) will only be possible if this can be done.

The following variants the Promethean Order of Requiem would often use include:
All of the above, declude Raider.

If this was too long to read:
All that is required is a little bit of effort from those who know how it's done, for I know nothing.
Would be nice if we could have Knight Variant bodygroups on Knights that have them set up but not used. I mean, why set up bodygroups for it and then not add anything except 'none' (other than to show battle-scarring)?"