Nympho is really hard to use and seems only really useful in ambushes. If an enemy knows you're there, it's useless. Though I think some weapons can cause stuns from the front too so they may work better for that build.I got the Milo's invite without touching the StaHerb repeatable quest
Great guide there
I'm not sure if Nympho is the right path, since I can't use Juicing in fights