Having the base creature become a living construct does handle some of the more complicated issues...
"Living constructs can be affected by spells that target living creatures as well as by those that target constructs. Damage dealt to a living construct can be healed by a cure light wounds spell or a repair light damage spell, for example, and a living construct is vulnerable to a harm spell. However, spells from the healing subschool provide only half effect to a living construct."
"A living construct responds slightly differently from other living creatures when reduced to 0 hit points. A living construct with 0 hit points is disabled, just like a living creature. He can only take a single move action or standard action in each round, but strenuous activity does not risk further injury. When his hit points are less than 0 and greater than -10, a living construct is inert. He is unconscious and helpless, and he cannot perform any actions. However, an inert living construct does not lose additional hit points unless more damage is dealt to him, as with a living creature that is stable."