00:50:00 20 Candy + Wild3
00:50:00 Wild3 + R Wild
00:50:00 Wild3
00:50:00 Pudding half
00:50:00 20 Candy + Wild3
00:50:00 R girl
00:50:00 20 Candy + Wild3
00:50:00 Wild3
00:50:00 Wild3 + R Wild

Wild3 for 1 R Gacha tichet + 1000 Pero almost every time seem to be a really good deal to me.
It also can give R girl.
3 R Gacha give wild5 some time but less often and cost 3 more.

Maybe this is the most efficent way to donate