Final Fantasy VIII Loyalty Challenge

One Guardian Force per character challenge (or Loyalty Challenge) is to try to beat both Superbosses and the Final Boss while never transferring summons.
To keep matters less confusing, Laguna, Kiros, Ward, Seifer, and Edea each get their own GFs, different from the 6 main characters. That makes for a total of 11 junctionable GFs, but I cannot swap GF from character to character. Magic may be transferred, however.
When the story tries to transfer junctions(such as from Squall to Laguna), must fix it immediately. There is never a time when this fixing is unavailable.
All subscribers are allowed to ban one GF per playthrough. As I meet that requirement, I'm banning Quetzacoatl. If more bans are delivered, then I will add them to this document.
The list of GF assignments for the first playthrough: Squall<--Shiva, Seifer<--Ifrit, Laguna<--Siren, Quistis<--Diablos, Irvine<--Brothers, Rinoa<--Carbuncle, Zell<--Cerberus, Selphie<--Alexander, Kiros<--Pandemona, Ward<--Leviathan, Edea<--Tonberry.
Will do another playthrough with this challenge when someone else bans a GF, or if I have determined that defeating Omega or Ultima Weapon is impossible with the current run.
As I was asked to provide results of the run, here are a couple of highlights of the most difficult feats in the run. https://www.twitch.tv/spyandrew/video/1690339558 //Ultima Weapon dungeon ; https://www.twitch.tv/spyandrew/video/1690322876 //Omega Weapon battle

Update:
I decided after playing through some 10+ handicap levels of Roguebook that I would try applying the same logic to this challenge run. This means I first completed this challenge run on handicap level 1 and I'm currently in the middle of a handicap level 3 run.
Currently, Quetzacoatl, Shiva, and Cerberus are banned, for a total of 3 banned GFs and therefore the handicap level is 3. Shiva and Cerberus were both banned because they were each used in both of the superboss battles. I used Carbuncle vs Ultima Weapon and Brothers vs Omega Weapon.
On the current playthrough, GF assignments are: Squall<--Ifrit, Selphie<--Siren, Laguna<--Diablos, Irvine<--Carbuncle, Quistis<--Brothers. I'm thinking about using Bahamut, Pandemona, and Tonberry, also tempted to use Cactuar, but might save him for next run. I don't think Kiros or Ward will be able to comfortably grind any refine abilities(if they even can starting from Disc 3), so it's just mostly a question of what I give to Edea, Zell, and Rinoa at this point, with Rinoa probably getting the last choice in the run.
After the current run, I plan on lifting the ban on Shiva and banning Ifrit for the first time, and I will ban two more GFs, possibly Siren and Carbuncle so that I can reach handicap level 5 for my next run. If I think I can get away with banning Brothers as well, then I may do a handicap level 6 run next.