Lapistia

In your case, 660. And Revan, I think, is not so much bothered by the ratio of the average effectiveness of the Water Bolt to other spells, but rather by the ability to deal thousands of damage to an opponent in one turn if enough energy is spent. Disintegrate doesn't have that feature.

Added after 47 seconds
Or he will die during the time skip when another player accidentally draws a bad card.