So what´s the good E2 for libido.......I had a raging libido at 30-40 E2 and i dropped it now to 16 i basically been strugling with 0 libido and 0 morning erections!!! do you guys think e2 of 16 is too low??

ive read 27 is best, but im sure it matters person to person. if 30-40 is good 4 u then its good 4 u
It varies from person to person. Also you have to take into account SHBG. Generally, the higher it is the higher allowance for E2.