Place gear suitable for a wide variety of pets in the Healer quest (mostly in the home level), and an amulet of life saving in Hippocrates’ chest.

Hippocrates, being sick and frail, does not start moving around when you first chat to him. You cannot use his throne or chest until you complete the quest and heal him with the Staff of Aesculapius. Before this, if you wish to kill him, he is extremely easy to kill and should be easily one-shottable.

Add herblore (possibly as a non-combat skill). This allows you to brew various potions using herbs and potions of water. Healers are quite good at it, and their quest contains many herbs. Requires actually implementing herbs, which cannot be planted or grown like in ADOM.