Da Fei's tactics, although well thought out, were actually very simple to execute. When that Martian launched a surprise attack from behind, Da Fei would use the "Great Positioning Technique" Divine Skill to evade, forcing the Martian to battle the Demon Army. But there was a big prerequisite, which was that the Divine Skill's timing allowed for a safe retreat.
Otherwise, if the Contract Demon was guarding the location where Da Fei would reposition, it would be quite troublesome.
To escape, Da Fei had experience from dealing with the Mountain Giant, which was to use the Spiderman Artifact "Cliff Walker" to fly away. The forest scene was full of trees, providing many places to escape. Even now, underground, there were still plenty of Mushroom Trees, allowing the plan to be executed.
