i need advice about candy-flipping

so i've done acid, and i've done E, and i want to candy flip(both at the same time)

i was talking to a friend about it, but well..
she's the kind of person where you never know if SHE really knows what she's talking about, and even if you KNOW that she's wrong, she also KNOWS that she's right.

but what she said was that if i do, to take molly(pure MDMA) instead of just some random E pill(E is cut with other random drugs, usually meth)
she said that the random shit in E would be bad to mix with acid.
but MY problem is that A.) i've never done straight molly, and B.) molly is like... 2-3 times as expensive as E.

does anyone know if it would really make a difference between molly and E when i do this?

also, i've planned this out with a friend who's a girl and we're going to have lots of sex during this.. does that change anything? i mean i know from experience not to get cokey pills(first time i did E they had coke in them and lucky me! was gonna have sex with a girl, but because of the coke couldn't get it up.
had fun anyway, but sex would have been better), but other than that? anything?

 

cocaine is usuaully never in pills, very rare. and i would take molly instead of an E pill unless you've already tried the pills and know they are straight mdma. you don't want to be on meth while tripping, and i don't know why molly is more expensive than pills, thats kinda odd.