Me too. Later girls will give less energy. But when nut had their birthday event and discount, I chopped in a few gold and maxed warp. And even with that one will still struggle to get past Twins. Let alone the new Anya after Winona or any of the police girls for that matter.
How do you save the chain-image while viewing it being animated? I picked them from the url.
Even with 20x your stats you wont. You will get 2-3 diamonds for challenge with 2M stats... You get diamonds by not spending them for anything else than warp at discount. And of course quest rerolls.
Ouch.
firefox goto page about:cache, chrome goto page chrome://cache Get a cache viewer or poke the file directly. Animations end with anim.png. There are several and I do not know, how they are stitched together. Most complex is Mistlehoe.
You can see her, if you have completed all girls up to Zoe.