Hi Cooper,
I took lower dosages of shrooms to begin with but after Accutane it seemed like the shrooms had zero effect. I slowly increased the dosage until 4 grams, which turned out pretty normal for me, but it may be to much for someone with zero mental side effects. As I kept taking the 4 grams, and my brain recovered, the 4 grams did eventually become stronger and stronger.
Also, I tend to stay away from LSD simply due to its duration and stimulating effects, if I start having a bad trip it can literally last 10+ hours. On shrooms if I start having a bad trip, I know it will be over relatively soon 2-3 hours, usually followed by a nice sedating effect. LSD on the other hand works more like a long lasting stimulant, and I am usually tired after tripping that long.