So after posting up my first Atro GGC 3 unit friend GGC win , I felt bad (bored), because the strategy didn't help anybody really, double Tilith strats require...well Tiliths to do.
Bearing that in mind, I have now got this for you guys!
This beauty of a team and run
 
Firstly, thanks for reading/looking thru that gallery~
 
Next, see the greatness of it?!
Ultor , after being semi-relegated to being a predominantly Arena lead, is actually key to this fight. Well he wasn't the only key~ His defence buff on LS is pretty nice but his entire LS is actually not very necessary for the fight (these pics actually come from my 2nd clear using this squad formation, first time was my own Tridon as leader, and a Non friend Ultor). His selfish mitigation however was key~
 
Now, Tia what a girl, overshadowed by Ulkina, tree, Lignes soon, but without her, this wouldn't have been possible. Her heals and residual healing allowed some turns to just guard and get healed and BB gauge fill. Her residual healing heals for like 4-6k, its actually crazy good and her stats meant that I was totally fine with letting her attack to help generate BC
 
Narza, absolutely integral to the operation, his SBB allowed Ultor to regain his BB every. turn. without. fail. Meaning pressure was off the rest of the team, aside from AOEs. Stacking up mitigation Ultor's bb/sbb meant Ultor took double digits / single digits worth of damage when attacked while everyone else ate up some delicious BB gauge if AOEs hit.
 
Obviously Tridon was the last part of this run, SIGH yes. I know. Tridon. He's BS. I know! I triiieeeddd maaaan, I tried Grah as leader but it didn't go so well, I might try again in the future. :\ .
 
Regardless! I'm way prouder of this run compared to my cheesy-pants double Tilith Tridon strats!
 
So to those without a Tridon of your own, without Darvanshel, Shera, Ulkina, Tree, and look at your Tia or your Narza and sigh because all the cool kids are talking about those other units, and if you got Ultor and sighed to yourself about how such a cool taunt mechanic could ever be helpful, this is it. GGC muthaf*er.
 

Ultor/Narza/Tia (Tridon friend) It's the new META.
Appreciate them! They're really really freaking good.
 
Also for those wondering, Spheres were: Narza-Lexida (mmmm..delicious hit count...:Q___), Tia-Leomurg (HP/DEF, the heal BB boost was not key), Ultor-Providence Ring (perfect sphere for his duty, he generated so much BC from being wailed upon by the enemy), Tridon-Dandelga/Ihsir's Guise (hm, would've preferred him to have had Alzeon Pearl instead of Guise, but it wasn't an issue~)
 
And once again thank you for reading my lengthy bullpoop, I don't know if this post was a guide or an achievement but whatever~ So yeah. errr I'll be attempting more stoooopid BS runs like this in the future with all difficult content. I've actually been trying to do a 2 unit friend GGC level 3 clear, but it's so hard, like, oh my god. But if you wanna help teamcraft or help with my BS endeavours, feel free to pm me or w.e IDK if you guys even care D:
 
TL: DR Welcome your new overlord Metagame units: Ultor, Narza and Tia.
 
I'll be lurking around so feel free to drop a comment/question or w.e below.