I have red marks and acne scars. I’m using IPL to treat the red marks after which my dermatologist said to use erbium laser for the acne scars. I have used erbium before and it didn’t improve my scars by much. I asked my dermatologist if I should use TCA cross instead but she said the scars are too shallow and should improve with erbium. Based on the photos is TCA cross or erbium/fractional CO2 the better option? Also what percentage of TCA should I use ?