I think that there is no need for narrow diffusers for you. You have 2 great sources of light, just put em both to the sides on good angle and be sure that your lights are max 20-30cm from plant in full flowering.
You are doing great work with pitching fan leaves fro plant, just one question - how often? Is it once in 4-5 days ot it's practicaly everyday? I still did not get which method is better and doing it practically randomly
Great plant with good perspective made with straight hands

Wish to see it in flower