Method

You will likely only be able to complete the first wave with the 'required stats' but won't be far from completing the second and should be able after your first few mythical gear upgrades. Chests are where you'll be getting your mythical items so make sure to open all of them after each wave.

There is only enough mana to place the defences marked with a '1' in the first build phase. If you're going to attempt the second wave or higher, prioritise building the other defences before opening chests during the second build phase as you can loot that round of chests while you run around killing the monsters from wave two or any time before the third build phase.

Notes

Always start the next wave even if you don't intend on attempting it as this will cause all items left on the ground to auto sell, then you're free to return to tavern. You can accumulate quite a lot of mana by doing this while farming your first decent mythicals.

It is possible to complete the map with this setup and it does pretty well as far as squire-only goes but the intented purpose is farming some of your first mythical items as a solo squire/countess upon reaching level 74. Good luck.