wow. If you have to ask you can't afford it.. in this case for your health! Don't do molly 2 days in a row, especially multiple pills.. hell most pills nowadays are triple stacks so you could technically be taking like 3 doses per pill. start with 1, see where you are in an hour and take more till you feel comfortable with the ish. Icecream scoops Ms. Botwin, Icecream scoops.
As for shrooming, I'd do the shrooms day 1, and molly day 2. Shrooms, I have to take a diesel dump afterwards. Molly I just wanna chill in a dark quiet room all day. Think it'd be easier to roll after tripping than vice versa.