The description of the Gift of Consumption (Su) hex says:
The witch curses a creature to share any effects that target her vitality. Whenever the witch is exposed to an effect that requires her to attempt a Fortitude save, as an immediate action she can curse a creature within 30 feet to share the effect. The hexed creature must also attempt a Fortitude save at the same DC as the witch’s, and on a failure it is subject to the same effects as the witch. Regardless of the outcome of the saving throw, the creature can’t be targeted by this hex again for 1 day. This hex does not function with effects that require additional types of saves, such as phantasmal killer.
The Greater Gift of Consumption (Su) hex description says:
The witch can more effectively redirect effects to her proxy chosen by the gift of consumption hex.
When the witch succeeds at her Fortitude save against an effect that she has redirected to a proxy, the hexed creature takes a –4 penalty on its Fortitude save against the redirected effect. If the witch ever fails a Fortitude save or intentionally exposes herself to an effect that requires a Fortitude save, such as by ingesting a poison, she can redirect that effect to affect only the hexed creature, though the hexed creature can still attempt a saving throw to resist the effects. Once she has redirected an effect to another creature in this way, that creature cannot be affected by the gift of consumption hex again for 24 hours. The witch must have the gift of consumption hex to select this hex.
Can the gift of consumption hex be combined with beneficial effects, such as the spell "Delay Poison", which has Fortitude (Harmless) in its save descriptor, and target an ally?
Does the situation change if the witch character has Greater Gift of Consumption?