Moe:

1st Kanae (150 SEG) 11100
2nd Hiyori Katagiri (normal gacha) 11000
3rd Moena Kawahara (event gacha) 10960
4th Kasumi (EG 1 (100k EP) 10920
5th Sora Shimada (stage 2-3, ghq) 10890

Babe:

1st Miu Minazuki (Gambit 1, ranking) 12020
2nd Mako Fujioka (stage 2-1, ghq) 12000
3rd Yui Takami (stage 1-2, ghq) 11840
4th Miyu Kizaki (event gacha) 11830
5th Shiki Urawa(Coliseum 1 gold box) 11820

Sexy:

1st Lilith Lil (Facebook event) 13120
2nd Shiotsu Rino (EG 2, ranking) 13070
Miho Osaka 13020
3rd Chikusa Uno (Event Gacha) 12700
4th Saki Kakiuchi (normal gacha) 12660
Meiko Kise 12470
5th Ayako Mayuzumi (normal gacha) 12430

In sexy I didn't rank Miho or Meiko because I'm unsure if they can actually be obtained at the moment, however, if they can be they would be placed where they are shown on the ranking I did. I also did top 5 to show a couple more beyond the top 3 as well as if someone wanted a full team if they could. Luckily from what I can see in the top 5 not many were event gacha. Though I also want to say that Kanae might as well be included in that considering the difficulty of obtaining.