The best wireless tattoo machine for lining and shaping depends on personal preference, but the FK Irons Flux and Cheyenne SOL Nova Unlimited are highly regarded among professional tattoo artists. The FK Irons Flux offers a powerful motor, ergonomic design, and adjustable settings, making it ideal for crisp, consistent lines and smooth shaping. Its long-lasting battery ensures uninterrupted work during longer sessions. The Cheyenne SOL Nova Unlimited, on the other hand, is known for its quiet operation, precise control, and adjustable stroke length, providing versatility for both bold lines and intricate detailing. Both machines are lightweight and designed for comfort, making them excellent choices for creating clean, professional results.