Quote Originally Posted by Davion View Post
It's luck based (or dev-trolled:P ), on my additional account i had 5 copies (including 100%) in 14 runs, on my main, only guaranteed (similar amount of runs). This 5 copies were enough to minicost and skill 4/5.
Sometimes i struggled with 15 or so copies to get -3 cr, sometimes (like with rita) i had 100% cr on every copy used. On momiji event i farmed 29% drop map, and had around 45% drops and managed (also with luck) to minicost her + 8/10 skill. On Imelia event, even when i throwed around 10SC i managed to get 400-450 collectibles (farming map with best drop rate) :P So it's random, although on average there is droprate of x% when looking at results of all players.
Yeah the random factor is present for most online games nowadays so it is hard not to be screwed over by the loot systems at some point, though you will get other times where it works in your favour. Some events I breeze through them like Imelias event I had very good luck with her drop rate and getting the perfect unit quickly.

This event however is where my luck seems to have gone for a turn in the other direction though it may just feel like that due to the low drop rate of Belinda. I have been lucky in getting a lot of copies of Soma however which I will need to AW Nanaly so this event has been kind to me in another regard even though I wasn't farming archers.