So here's something interesting.
I'm very new to the Gauntlet and still unfamiliar with a lot of abilities, but it was still surprising when I got owned at lv 2 with a full defensive lv 10 team. Luckily I was paying attention to the round and witnessed what had gone wrong: a Follium had stunned my fastest attackers with Backstab, a Mutterbird was continuously pumping everyone's energy with Motivate, and a Teufel was using that energy to Stomp and stun-lock my entire team until I lost without ever getting a single attack off.
So I got curious if I could somewhat recreate this event from the player's side, and arrived at this:
(Zerda, Jocol, Kit, Grouger, Teufel)
Motivate + Fortify + Stomp, with some help from the Kit's Tactician (1) to boost healing from Blossom Maul.
This was a test run, you can see by the levels. I wasn't expecting the team to make it past lv 6 without casualties, but to my surprise they carried on pretty much full health up until here: bad RNG finally managed to get rid of the companions, basically destroying the team's whole thesis and causing a loss.
Some notes: Intersect doesn't mesh well with Fortify. Since the Kit is protected, the damage it'd take was often 0, so rather than counter it would just nullify enemy attacks a lot of the time. I'm considering swapping it with a Lupin for Assailant (4), but that 10% base dodge and higher defense are doing a LOT of heavy lifting keeping the frontline alive.
Maybe it was a fluke, maybe it's too RNG-dependent, but I think this team has some potential. I'll fiddle around in the near future and work on leveling the backline up all the way.
Edit: ok I was exploring with these guys (minus the Zerda) and they took down a Vespen encounter. A lv 2 and a lv 3 companions in the frontline, the Kit and Jocol in the backline. The Kit was essential to counter the Kuzma's insane Berserker-boosted attacks and the Stomps were essential to stop the Vespen from killing the frontline guys. The Jocol healed faster due to Motivate too. Again, not sure if it's just dumb luck of actual good team synergy. Will report back.