"Guess I could do this in two turns. Now which way should I have Marth go?" might be the easiest way to put it into English. Without rewatching too much of this episode for context, I'm guessing that he doesn't necessarily mean two turns LITERALLY, but having two units go separate ways to route the enemy, as the narrator clarifies after Arino speaks.
BTW, if you have any other issues, feel free to PM me. I'm new around these parts, but I'm a huge GCCX fan and I'd love to assist wherever possible.