What If... The WoL Became a Lightwarden?

I have a sort of fanfic crossover AU idea that I've started writing that might tackle, not what if the WoL became a Lightwarden rather than rejoining with Ardbert but what if another Scion - also blessed with the Echo and thus able to help with handling the weaker Wardens and some notable sineaters - became one instead?
Inspired by this half-baked idea, and having finally acquired the Sleeveless Martial Artist Vest (which comes complete with suitably tart-ish rear window with bonus tassel), I swapped my RDM glam out from the Dalamascan Draped Top and Kupo Trousers I've had for years - since the top came out actually - for a new look that goes all in on white and gold rather than red and black. The new two-dye system may be flawed in its implementation on some gear items but it went a long way in putting this glam plate together.
My new Aspho rapier was an unexpected bonus in letting me have a glowy rapier in the right colours - the Aspho weapons seem to dye really well.
I also got the Aspho scythe but of course they also released the Divine Light craftable weapons using the material from Hydaelyn Ex in 7.2 and I had the spare gil so my RPR has skipped straight to the War Scythe of Divine Light which really does suit my current RPR glam to a T.
I do wish we had more glamour plates, I'd love to make a glam per job including all my DoL/DoH jobs too, and with all the new tools, weapons and gear available these days plus the graphics updates and two-channel dyeing, I'd really be able to push the envelope on some of those outfits.
Anyway, maybe one day I'll put my little AU FFXIV fic up here. Maybe. Depends, there's a lot more to it than just a What If snippet from ShB so I've a lot to write before that ever happens.
Chatter