Anyone have any tips for beating the demon king level 1 now that you cant steal "the indestructible" anymore?
I'd suggest farming money, magic points (soul crystals), perk points and gear.
You can get crystals from the golem encounter, if you calm or soothe her and ask for help, 1 per encounter.
Perk points you can get from the ghost encounter by letting her down gently after "entertaining" her, but this has to be done before you level up since if you open up the level up menu when the level up notification blinks on the lower left cornen, you'll advance a level, thus voiding the achievement, strength, endurance and agility are what you'll need to upgrade first for combat capability.
Money is rather easy to come by once you know what to do, you can also take loans from the bank and (200 is max debt you can have before you either have to pay it back or get a bad end if you default on your loan), you can however cut your debt through the bunny (puca) encounter that happens periodically when you're in debt, just offer to pay with your body and it'll cut of 25g per encounter (or 100g if you do the tavern encounter in the 4th map).
Once you have money and crystals, buy and upgrade your gear.