Uh, false. 2 mana every round. Every time you balance, you lose about 15 mana. Every time you counter, you lose about 15 mana. Every time you onslaught, you lose 3 mana. Also, you'd be dual wielding. Bye-bye defense. So I would come at you either A) Prepared for offensiveness, meaning a staff and a bow, or
Know that you aren't that strong and come after you dual wielding flails, the first of which will be nodisarm, and the second of which will have an ember socketed. I would start bashing just for the extra damage and to drain your mana. You'll be blind and out of mana before you know it.
I very rarely lost a fight to a blademaster with my ogre warrior, Grom. But I certainly wouldn't have lost EVER if they tried using those tactics.
It sounds great in theory, but it's not a good plan. I promise. 
perhaps its my favoritism for elf/drow blms and their extra mana, but when i played mine, mana was never an issue.