Game Mechanics: Ticks

[Magifyre]

I watch my mana tick up, giving me enough mana to cast a spell, then try to cast, and my mana ticks back down, and chat log tells me insufficient mana. No fizzle, just the tick undoes itself. I lose the mana that I just gained, after the tick already completed. This makes it impossible to actually actively cast spells between ticks, and it happens constantly.