I got some of my GF's more than 200.
Ifrit: I think I once saw a 186 when I did boost, my finger was incredibly sore after that
Shiva: around 175
Quezacotl: around 170; I think it was 174
Brothers: I think it was 204 or very close to that
Pandemona: very close to 211
Leviathan: I think I once got to 245, it was VERY hard but I reached it.
Tonberry: around 185
Alexander: around 225
Doomtrain: 255, its VERY hard to do it and it depends on what pattern the X appears, I've done it a few times only
Bahamut: 255 quite easy
Eden: 255 even easier