Kratos never directly fought Helios, the dude was basically done by the time you get to him from Perses crushing and hurling him into the mountain side.Pretty sure it comes from Helios, and him being able to somewhat react to Hermes' speed.
Hermes’ is not a good one to use since Kratos was able to tag him with a boulder launched from a catapult. Not to mention needing said catapult. Running speed in God of War is slow, it’s the select few reaction feats that are much higher like again, Kratos reacting to lightning in-game.