Mace shard drop rate

Roughly 34%.
Have him 30/65, which means I got 110 shards so far. Doing 36 attempts per day for 9 days, give or take

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.

OK, did refreshes upto 400 crystals. 3 shards. Nice.