The damage done from the Rift ability on the final mission seems hard to calculate, and seems based on will of the attacker and defender.

Does anyone have a good calculation for this yet?

I've noticed:

• 15 Damage on Muton Elite
• 10(?) Damage on Ethereal.
• 8 Damage on Uber Ethereal.
• 4 Damage on Stim'ed assault soldier with 150+ willpower (I sent her in for the kill!)