Tidal south is vile. I've got 4 mythical, fully equipped level 50s running it, and can not get past lvl 7. Thats just poor design.
Sorry about that – you're right, I made the Tidal South too hard. In the latest patch on my website (towerandtrail.com), this map is now a great place to hunt for strong gear, and I've also made a small balance change to make the characters a bit stronger. If you want your team to get through more easily, try 2 Mages, a tough Warrior as the tank, and a Bow as your main damage – it helps a lot.
Just a note: updates on itch.io come a little later than on the website, as I mentioned on the game page.
If you'd like to move your village from itch.io to the website:
1. Here on itch.io, click Export under the Log (on phones it's in the menu). It saves your whole village to a .txt file.
2. Open towerandtrail.com, click Import in the same place, and pick that file.
Your heroes, gear and everything else come with you. On the website you can also sign in with Google to keep your save in the cloud across devices.