- Gith know more about Illithids than most other races.
- LZ is an ordinary foot soldier. She has probably learned the history or their people (enslavement by Illithids, saved by Gith), that Illithids have strong mental powers and they infect people with tadpoles to reproduce.
- She may have heard that there is a cure, but she knows no details.
Those are all good points ...
Wich our characters (you know, the people who should ACTUALY made decisions) most likely (unless they are surprisingly educated half-elf, urchin, Shar cleric, that was send to suicide mission like a common foot soldier) never know.

Remember Gith are aliens ...
Fear of them dont originate in years of enslavement, terorizing and murdering ... as it is for example with Drow.
Most people who fear Gith fears them bcs they dont know them, bcs they look odd and hostile, and bcs they often act hostile aswell.

Basicaly, until some interaction happens, its xenophobia in its purest form ... surprisingly acurate tho.

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And this is coming from the illithids' ancient enemies...
Speaking about metagaming ...

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If the githyanki can remove the parasite, then it technically counts as healing, and to me, that's what Tav thinks when the question is answered. Thus, it surprises me when Laezel disapproves.
Technicaly maybe ...
But i believe that Lae'zel understands it as you either are looking for Creche > she approves ... or you are looking for litteraly anything else > she disaprooves.

I intellectually understand that Shadowheart doesn't mean the githyanki when she talks about finding a "healer," but that's only an understanding I developed after playing the game.
I see ... well, as i said i didnt talk with her for quite some time ... so its possible that this part of dialogue was removed in order to make her "nicer" ...
But i remember her specificly telling me that while it sounds like horrible idea, she would still rather put her life in hand of that Gobin priest, than thrusting a Githyanki ...
And that was in Druid Groove ... so quite early.

Let me clarify, then.
A. I see nothing wrong with a player buying into what Laezel is saying.
B. I see nothing wrong with a player not buying into what Laezel is saying.
C. I don't believe there is any one gospel truth as to what a player should think about what Laezel is saying.
This is good to know ... i gues.

But it didnt clarify, nor answered any of those questions.

What it means is that we're not talking about a systemic problem.
How would you call it then? O_o
Git gud?
Even if ... that that alone is huge if, bcs im not aware of this situation and wont lie to you ... i dont believe he did ...
Tav 100% says outright that Halsin is the best option. This is a fact, not a debate.
So you said ...
The question was in what situation ...
Honestly ... your inability (or unwillingness) to answer dont add much credibility to that claim. :-/
Nope ...
No matter how many times you repeat it, he is only one of your options ... nothing more, nothing less ...
He is the first one you can reach IF you follow certain path, that much credit i can give him, but still not the only one, and faaaaaaaaaaaaaaaaaar from being the "best one".

That both is just your headcannon.
Yeah, I tend to think the barbarian is a lot more effective than the bard. Most combats, in my opinion, feel easier with the barbarian.
Well, to be fair i had the same feeling with Sorcerer and Druid. :-/
If the fight is too hard for you, lower the difficulty.
You presume there will be the option ...
I didnt play DoS so i dont know Larian approach to this ... but dont you know that there actualy are games, where you can only choose difficiulty at start? O_o
I admit that they are mostly "older" games ...
But still, its not impossible ... Larian may for example decide to make this difficiulty we just play to be "Easy" ... and made nothing easier.
We simply dont know > thats why its not an argument.
As for the difficulty of the fight: it's winnable.
And irellevant ...
...artificaly incerased hitpoints...
This I have a real problem with.
I do not like it when the NPCs play by different rules. It is my strongly held opinion that NPCs should have the same rules for stats and hit points and abilities and everything. If the NPC needs to be stronger, raise the level by following the same rules.
You, me, and concidering this forum alone few dozens of others.
And its not "just" hitpoints ... but also their stats imho.
Even tho *that* part can easily be argued by that fact that we have promised rolled stats ... they just rolled exceptionaly well ... all of them. -_-
But until i will be able to start my Barbarian with 20-14-20-?-?-? on level 1 ...
I will be complaining that those toadfaces have unfair statistics!

Wich ... to be completely honest ... kinda shows that Larian is unwilling or unable to create challenging encounter without cheating ... and that is in some point of view, quite sad.
And frigtening ... :-/