having engaged opponents since OOP I'd say a lot of people do not run hospitals at this point, your sustainability is thus greater than anyone not running cleric, and that means any warrior you encounter, maybe people will get them later on, but at the moment mostly orc/clerics would be more sustainable, just don't engage orcs and you'll do fine, later you might considder tossing in hospitals if more people run them at that point, I would not do more than say 10% max, you can use the build space for something else to a greater effect. Atleast hold off on hospitals until you are at your desired draft rate.