I thought his biggest asset with Cathoria was windwalk and chameleon. Marcus was able to camo and ambush people in the bushes and then chase them down in the bushes while his victim received wilderness lag and he didn't. At least that is how he tripped me to death once if i recall (and how many of his logs showed him killing). That was a very smart build. To be able to catch up to your victim after they run away is huge.