According to the ptr notes, you will now burn 13% of a bosses mana, up to 26% of your own.
If you have 17000 mana (which I have seen regularly) and a boss has 50million that means mana burn does 2210 damage before modifications.
Is this worth it in a dps rotation?
Is mana burn affected by shadowform?
ETC.
Thank you for your responses.