Jesus:

Hung on a cross (Neither on Earth nor in Heaven).

Wearing only a loincloth (Neither naked nor clothed).

Bread soaked in wine held to his lips (Neither feasting nor fasting).

Dispatched with a spear-thrust (never done in crucifixions, which were mean to be a slow death).

Agamemnon:

Getting out of his bath (Neither on land nor in water).

Robe/towel thrown round him (Neither clothed nor naked).

Apple held to his lips (Neither feasting nor fasting).

Killed with a sword-thrust then decapitated.

Not entirely the same, but similar enough to suggest a common source. If that's the case, then what we are looking at is the ritual death of the vegetation god worshipped under various names throughout the Mediterranean. A religion with which Paul, the Hellenised Jew, would have been familiar.

What is also interesting is that both these tales have been altered to suit the times they were told in.

Jesus' resurrection is reinterpreted as a spiritual rather than seasonal renewal.

Agamemnon stays dead, but is avenged by his son Orestes, who is then cleared of matricide (the Ultimate Crime), through the machinations of the Olympian Gods. It symbolises the change in dominance as the Zeus-worshipping, patriarchal Doric tribes finally overcame the Goddess-worshipping matriarchal Hellenes.

Intriguing, but not proveable!