indeed he is using R my bad ^^Sorry to tell you that your completely wrong. This is an example of someone using the combo your talking about
What the guy in this video does is just R Skill R Skill (Not just spamming his skill, and not pressing R just at the beginning), which in my personal opinion is a lot better for warriors rather then double tapping R. However most have clinged onto the theory that you need RR SKILL RR SKILL, so anything less looks stupid, which is why yall don't seem to grasp that this guys combo isn't bad.
Bookmarks