AquilesBoy here.
I wanted to share the team composition I used to get 4 stars in the Ev3-1C stage. As is explained in the Discord, you need at least two runs. I'm using first an Flying team, second a Ligth and Heavy team.
IMPORTANT: I have to point that the stats and equiptment are the ones I have and are not optimized for this especific run. Most likely you can use the same strategy with less stats and simpler equipment, but I haven't proved it.
First run: Flying Team (Manual)
Tiamat + Snow Feather
Use Tiamat's A2 to attack. The stronger the better, that way is less risk. With the proteccion from Snow Feather, she should be fine. Adjust stats and EQ so you have 100% Crit in game, the rest could go to Attack.
Snow Feather's P2 give a 35% Area Fire Resist that stack 3 times, that alone should be enough for ressist the Tyrant detonation. The HP is low because the print is after the run, with full HP you can resist one bite from Tyrant. All stat and EQ to evade. Other option is Stimpack in case he bites you more than once.
This run needs a bit of luck, because the evade it's not enough when Tyrant is with the ACC buff, but I guees you can reduce the risk if you left both Tyrant low in HP before killing one so the other dosen't enter into 'Prey Monipolization' mode. Then killing the other as fast as you can. I made it at the first chance, so it's possible.
After this run, you have 3 of 4 Missions complete.
Second run: AGS team (No Flying units) (Auto)
I saw the idea in Arca and used it with my units. The pilar of this team is Goltarion and Arachne. With Goltarion in the front line, Arachne's P2 will inflict him Marked, so Tyrant will only attack him. Then you only need two AGS more for Goltarion's P2. Shade is a good option because of the fire damage, but any not flying AGS will do.
With the exception of Goltarion, use units with more than 4000 HP and Stimpack and they will survive both explotions.
The stats and EQ are not mandatory. The stronger, the faster. All prints are after the run, go full HP.
Arachne can go over 8000 HP, you can use stats or EQ for that.
Faucre for a faster run.
Formation in case Tyrant use his A2, but most likely he won't.
Let's go for those tunas!