Yeah, well that's hitman pride for ya.
Discounting the Alchemist fellow, Stiyl's the closest magician to take out Touma from memory. His sustained fire damage kept Touma busy at least. Weird thing was that Touma didn't figure out how those attack directions worked until some time afterwards, yet none of the earlier attacks hit anyway.
I'm just glad people are finally dying in Index (aside from the sisters). Leave it to Accel to do that for us. My pity goes to Hound Dog. For all their advanced scent scanners (which seem to be no more effective than real dogs anyway), they don't even carry a pair of night vision goggles.