I've successfully completed level 12 once, with a Jocol and Furmus in front, plus 2 Lupin and 1 Jocol in the back. Completing 9 or 10 is usually where I chicken out though.

The highest I’ve gotten is level 11- But usually i quit at level 9-ish!

Level 8 is the furthest I’ve felt comfortable going even with a full team of level 10s.

Level 2 because I’m too cautious ;—;

Level 14! One or two of them got knocked out that round so I wasn't going try for more, haha. On the same team I could still get a team member knocked out at level 7-ish and I've definitely had some battles where the opposite side is full of tanks/healers and the turn count gets a little too close to 20 for comfort, so 14 is by no means a consistent achievement and it was certainly a risky choice to take that bet, but I guess my belief in them and their synergies power of teamwork paid off!

12 here! Generally always get to ~10 with my team now :D

Level 6 because I have not bothered figuring out team comps at all XD

I haven't dared going beyond 10 yet, but I have a team of kit + monstropod in the front and 2x jocol + rodil in the back. It's not fast, but it keeps itself healthy and the stun/shields of the monstropod + the healing and special of the rodil are helpful.

Most of the time everyone is at full or near full health when I clear L10.

Level 14 with a very silly team

managed to clear 10 just now, too scared to go any further lol.