Once you get a few upgrades into Damage and Weapon Skill Damage I found that it was difficult but still approachable. I suggest trying things like the Berserker heritage to be able to quickly clear out enemies or invest into an AoE or ability or two early on if possible to help with the clear. It's all trial and error, but hopefully, this helps a bit!

Crusader with Nomad Heritage.

For Crossroads I would use Daggers and Chain Lightning. Prioritise Enchantment, Duplication and Expansion. 

Glyph is useful esp early game.

When opening chests try to get the dagger upgrades.

And if nothing great is showing while rerolling, get Study.

Edit to add:

Make sure that at minutes 7, 14 and 21 you are close to the center. That will give you a better chance at not being killed.

When is a good time to play the 2nd map (Crossroads)? Since there’s so little space, enemies are obliterating me. Any tips?