Something I’ve found is that they’ll only be excited to fight the gith at level 5 if there are enough people in your party. Found this out from my duo run when we were level 5 but my lone companion still discouraged me from fighting them.
Strange thing is i just went there at level 5 HM and astarion said that carve you up like a goose line. Maybe because it was just him and I? Level 1 lae'zel was there as well, never went and got her from the cage.
That's true. I f you only have one companion with you, they will said the level 1-4 dialogue. You need to bring at least two companions with you to trigger the level 5 dialogue