I have made some headway into my two problems.
First, I have figured out how to extract data from the DLCs and import it into Paragon, and Ive been able to actually create a new "Gold Faceless" class. However, Ive hit a snag with it. I have managed to have the correct texture on the faceless model and now its gold, however the map sprites are continuing to be an issue. For whatever reason, all of the standard characters like corrin and azura can be gold faceless and the map sprites show up no problem. But when I try to turn my generic faceless character into one, the map sprites are of the robed outrealmer class. Despite my best efforts, I have no idea why other than I believe it is somehow tied to the AID.
As for the weapons, I have made no progress on that. No matter what I do, nothing changes. I can only assume that the individual models must be adjusted in some way.
For your Leo's Iceblade, I only found how to do it for Infantry, not sure where the animation for raijinto and siegried is to do it mounted.
In rom 4, create a new item
Create a new IID For now : IID_Iceblade
Scroll down to weapon model tab
Grab the weapon model of Iceblade which is: wep_sw037
Scroll down to attack animation tab
Grab Ike's attack animation from ragnell where Ragnell is also stored in rom 4
Animation is : uAnim_M_IkeR_sw0
For fimbulvtr particle effect you put it in visual effect
Visual Effects are: Mag_フィンブル
That is done. Now in items tab where you can make all the stat changes to the weapons.
Change Leo's iceblade IID into this new one.
This will now have Leo's Iceblade two range be like Ike's ragnell swing and do the ice effect.
Apply changes into romfs and there you go.
**Due note, Ike's animation for this swing is animating the whole body, so if a cavalier unit uses this, they will get off their horse during this animation if you don't want the immersion to break. It is infantry locked.**
Hope this helps!
And if you can help me, how did you extract DLC and import into Paragon?