More important than healing is avoiding damage entirely.
The keys to getting through noita are getting a fast wand to repel enemies and a wand that can dig through stone quickly. There are spell components with negative mana cost and cast time, stack as many of those with a single projectile type spell and you'll make a blaster that can kill enemies safely. The digging wand will let you skip tough sections, tunnel to areas with good loot, let you return to the "sanctuary" zones to edit your wands (if you haven't gotten the "edit anywhere" perk), and such.
Once you have those, you can make more utility wands that let you fly via recoil and whatever else you need.
More important than healing is avoiding damage entirely.
The keys to getting through noita are getting a fast wand to repel enemies and a wand that can dig through stone quickly. There are spell components with negative mana cost and cast time, stack as many of those with a single projectile type spell and you'll make a blaster that can kill enemies safely. The digging wand will let you skip tough sections, tunnel to areas with good loot, let you return to the "sanctuary" zones to edit your wands (if you haven't gotten the "edit anywhere" perk), and such.
Once you have those, you can make more utility wands that let you fly via recoil and whatever else you need.