Well, the Warlock is awesome. I finished the run with 23 Potions of Healing left, again (seven of which are Elixirs of Honeyed Healing)… Maybe not as impressive as this, but anyway… this is still a record for me.
As in the image, these are the challenges that have been enabled.
I don’t really have much of a strategy. I just try to focus on armors. With a good armor, even dwarfs can hardly deal you more than 5 damage per hit (in melee range) if you have a good armor. But in the early game when we only have a Cloth Armor, I will try to replace this armor with a better armor as soon as possible (as well as weapons). Once I have a Scale or Plate Armor, I will use all the Scrolls of Upgrade I find on these armors.
There are also a few other strategies, and they have all been mentioned. It helped me a lot and I think it will help you too.
(Since I rely too much on armors, I don’t think I can beat Faith Is My Armor).