PS. Your math is incorrect, salvages are independent statistical events.
He didn’t actually say what he was salvaging with black lion kits.
If he’s salvaging rares a black lion kit the rate is supposed to be 1.5/rare on average isn’t it?
Independent events doesn’t mean you can’t calculate the probability of only getting one in 25. E.g. with coin flips the probability of only getting 1 ‘heads’ or 1 tails is 7.5×10^-7. So his math is actually too generous as the the probability if his odds of an ecto per are >0.5. And he’s too generous by at least an order of magnitude.
For a mystic kit with a rare the probability of only getting one ecto (~90% chance?) on 25 trials is 2.25*10^-23.
Short summary: it sounds like he’s not telling the truth, or he’s used BLK on greens or something equally bizarre (or there is something seriously seriously broken).