Mace shard drop rate

It's all RNG. A lot of people were complaining about the drop rate of Kylo Ren but I got him from 4 to 7* pretty quickly. I would average about 10 shards a day from him while others had lower drop rates. It seems that Mace Windu has been a much slower farm for me with me being 60/80 after about two weeks of exclusive farming. I only use one cantina refresh per day as well. Of course, everyone remembers when the probabilities are not going their way but not vice versa.