Alternatively:

Remove squadron dungeon functionality entirely.
Build the trust system to do all story content from the first dungeon (lv 16). Including the pre-50, 4 man trials (Garuda, etc).
Utilize Edda’s party as trust members until the obvious, swapping for Scions (B squad Scions, like Hoary Boulder)
Expand it to function in 8 man content, utilizing scion NPCs.