You worded it as until the battle ends, but I feel as after I accepted it, you have strongarmed me into a death match, when I was under the impression there was other ways to end a battle.
"Parameter Rules (パラメータールール, ?) are a set of rules for representing the relative power of each item ranked by letters under different systems, translated into specific parameters "for no particular reason."[1] There are five main ranks, E, D, C, B, A, that each have a quantifiable number assigned to it. Considering "one" to be a "normal value", E is equal to "ten" and it increases by ten incrementally until reaching "fifty" at A. There is also an EX rank that represents a value that cannot be quantified under the normal system because it is in a league of its own, powerful to the extent of rendering comparisons meaningless.[2] There are two different "modifiers" that can be applied to ranks, + and -. The "+" modifier represents the capacity of a temporary boost in power if certain conditions are met, allowing a weapon or ability of a lower rank to surpass a higher rank for a moment. While a B+ is generally weaker than an A, B+ may momentarily exceed A by doubling its own power.[1] + indicates a two-times increase, ++ indicates a three-times increase, and +++ indicates a four-times increase. The specifics of the "-" modifier have not been explained, but it is present in a number of different situations."
He has A+++ mad Enhancement, since it is controlled directly by his rage. So its A basically, but under certain conditions it can raise to up 4 times A, basically I didn't want to put it as EX, because it is A rank, but it also means that his stats can volatility raise, if the desire rises he can draw loads of power for small bursts.
http://typemoon.wikia.com/wiki/Parameter_Rules
But its ok, A teacher servant is going to put a stop to this unsanctioned battle soon enough. I allowed you your kill, so time to start moving on.