General Guide
As the Doctor you have +200% attack speed with medical weapons, and -100% with all weapons in general. The attack speed is added together, so you actually have +100% with medical weapons. Due to the large negative attack speed with other weapons, it is best in most cases to stick with medical weapons. Medical weapons in general trade raw damage output for their innate life steal. In addition the medical class's bonus is HP regeneration. And the Doctor heals 2 HP instead of 1 with HP regeneration. So you'll have a lot of Healing just from your weaponry.