Finished mythical with neptune/green odin and siren/echidna/rainbow keeper/hades team.
Took 4 stones, all on Hera, while zero stoning it is probably possible you'll need crazy good luck - 9k heal per turn is a lot, a single bad round or fumble is instant death. She used her 'normal' attack like once during the whole fight, expect ice blast every turn and you won't be disappointed.
Took 4 stones, all on Hera, while zero stoning it is probably possible you'll need crazy good luck - 9k heal per turn is a lot, a single bad round or fumble is instant death. She used her 'normal' attack like once during the whole fight, expect ice blast every turn and you won't be disappointed.