LBM increase at around 1.5kg ( 3.3lbs). Current caloric into around 50:30:20 - carb, protein, fat. Carb sources primarily fruit and vegetable with very limited grains. Also, around 300 calorie per day from sugars found in energy gels and recovery drinks - as mentioned - high workload of Run,bike and swim at around 2000 calories per day. Proteins from Fish (salmon an tuna) and chicken primarily. Fats are "good" fats - Avo, nuts, oils and fish.
For pure lean building I would drop carbs and push up proteins - probably 10% each way.