Thanks for that clarification. Haven’t played much AoS in a long time because I haven’t got my Fyreslayers up and running yet and forgot that like in Fantasy you fight in both your turn and your opponent’s.
But to answer your previous question, yes she takes max 3 Damage per turn rather than per Battle Round, so can take a max of 6 per battle round. That’s actually better than I thought because if you’re extremely lucky you could engage her in melee as her Oracle form and inflict 3 wounds on her in your turn, and then if she fails to transform in your opponent’s turn (which is possible as she would need to get a 1-3 on a single die in the Hero Phase to transform), you then have a chance to inflict another 3 wounds in your opponent’s turn (if your melee unit is still alive) and kill her before she transforms. Your opponent may instead choose to automatically transform her, but of course she would carry over her 3 wounds and double them to 6, so you’d only need to take a couple more turns to kill her. Knowing Seraphon you could probably eradicate her with Solar Engines or spam Rippers to wear her down in melee.