The beginning of the end || Astarion dialogue before tadpole dream (full, all options)

In order to get this dialogue you need to:
use illithid powers several times (2-4? i'm not sure)
get rid of Lae'zel. Unfortunately, her scene triggers first and it leaves other companions with shorter versions of their dialogues. You don't have to kill her, you can just don't recruit her at all. She can't be in your party or camp at this point, otherwise you'll just get her scene with a dagger and short vertions of other companion dialogues.
that's it. afaik Astarion approval doesn't matter here, but just in case: it was Hight in my case