My DK build as a fire mage is using the skill that when you toggle it on does X damage every 1 second until you toggle it off or run out of magicka. Currently my DK is using this spell/skill what ever you wish to call it, and its still low level so I think that its doing 24 damage per second costing 22 magicka per second. My magicka regen is currently around 70, which according to the description, "regenerate 70 Magicka every 2 seconds while in combat".
Standing in town, with no other magicka abilities active, and not performing any action that would use Magicka, I toggle the skill on, and watch my Magicka decrease at over 150 every second.
I am no math wiz, but if I am supposed to be regenerating more magicka than the skill is costing me, shouldn't my magicka go down as the spell toggles and then go right back up to full? as my regen is higher than the cost of the skill.
Perhaps I am missing something really obvious, and If I am, I would appreciate it if someone could explain it to me using small words, as my daily meds don't leave a lot of room for clear thinking.