How to Structure a Lean Bulk for Maximum Muscle Growth

I am finally starting my growth phase after a long diet and I want to know how to structure a lean bulk for maximum muscle growth without getting sloppy. In the past I have been too aggressive with my calories and I ended up gaining more fat than muscle here in California. I want to keep things much tighter this year.

I am planning on a surplus of about three hundred calories per day using mostly whole foods like jasmine rice and chicken breast. I have heard that a slower rate of gain is better for natural athletes to avoid the metabolic issues that come with being too heavy. I am also keeping my steps high to ensure I stay active.

What do you all find is the best macronutrient split for a lean bulk? I am currently at forty percent protein and forty percent carbs with the rest from fats. Do you think I should push the carbohydrates even higher to fuel my heavy squat sessions? I would love to hear your successful lean bulking protocols.