I fed her about 50 R gacha tickets, most one at a time. I WAS trying 2-3 tickets at a time, but after she gave me 1 R gacha ticket as a prize for feeding her 4 r-gacha tickets TWO FUCKING TIMES, I got tired of that shit.
After that, I fed her one R gacha ticket at a time until I got tired of it. Ultimately, I decided to keep R gacha for the next update to the card list. Conveniently, one just happened. I haven't started spinning the R gacha, but I plan on doing so tomorrow.