Simple Strategy for Level 8

There's a limit to leveling up guns, and you can't do much without grinding, so the effective hit is definitely the Blade Wave (the spinning one) lol I felt it was effective to prioritize skills that lead to it, and also to quickly acquire elite/boss attack buff skills. From Level 8 onwards, the sheer number of enemies and difficulty increase dramatically, making it hard to even carve out an escape route, so the Blade Wave, which lets you stay put and feel safe, is the safe bet 😊