"Aromatase inhibitors tend to cause fewer serious side effects than tamoxifen, such as blood clots, stroke, and endometrial cancer. But aromatase inhibitors can cause more heart problems, more bone loss (osteoporosis)"
Aromatase Inhibitors: Benefits, Side Effects, and More - Breastcancer.org
Everyone is completely different on what they might or might not need on cycle so I cannot see anyone saying with certainty. You have to just judge and learn your own body