Ah, true. Though in order to reach temperatures that high he has to charge (prep) the attack. Probably at a rate of 10,000 degrees per post at high tier, and 1,000 degrees per post at intermediate. So two prep posts to fire one full-power bolt. I just wasn't sure on the prep time when first making the edits.

Point is, he can't endlessly fire off bolt after bolt of max power lightning with impunity.