Random crushed pills

[lola]

Hi, was given a bag of crushed Molly pills (not MDMA crystal though, actual pills) by a trusted friend of a friend, allegedly they aren't monster strong. Unsure why they were powdered this way. Only one pill is intact but unsure if they were all the same originally. Got 0.000 scale so thinking to weigh the intact one, weigh same in powder and we go 50-50 with both to ensure we get the same dose then top up if needed. Was thinking of bombing or putting in liquid (does it make a difference between pills and crystals?) but wanted to ask what you think. I've never has such a situation before and not sure how to work out the average weight of a pill either? I like to dose in advance as much as possible and hate the taste so don't want to keep dabbing, but also not taken too much as it's a day techno festi and I want to enjoy myself... Any advice?