You should have a decent success rate, but definitely not 100%, over time or whenever you can try to upgrade the gear. I would first get the heal charm asap because without this your welling rate will drop tremendously and as you said, get a focused or regular heal. If you can't then go for wild but try to get focused or heal first. It should cost around 300+ For the heal charm, and then I would look into upgrading the charm. Then the int armor, and weap. Just remember, if you fail one or two wells don't let it show that your gonna fail everyone, just keep at it but at the same time don't overhope for a 70% pass rate.