First of all, the Nameless One stats on the character creation screen are weak. He has 54 points in total, nine points in each stat. The recommended way to use the 21 points available at the start is something like: 16 int, 16, wis, and 16 cha. The problem with this is that he sucks at fighting. This is a big problem because I’m not a big fan of mages in IE games, especially when I have just two members on my party. So, I’m thinking to play as a warrior. But this has a problem or what I think it’s a problem, it has to do with the story. As you know the Nameless One doesn’t remember his past. Intelligence and wisdom help to recover his memories faster and wisdom also gives him a bonus in experience points. My question is: do you miss a lot of the story if you don’t use this character build?
Now, if I use the warrior which one of these is the best?
First one: Str 16, dex 16, con 16. +1 melee dmg and +2 AC
Second one: Str 18, con 17, wis 13(above average, maybe this will help to remember some things if it is that important for the story). +1 to hit +2 melee dmg.
Third one: 18/00 str, 16 con. +3 to hit +6 melee dmg. This looks strong but I have no points in dex, will I get good armors in the game?
What about charisma, is this stat important to get a strong companion or an interesting reward or something like that?
Most people who want the "ideal" playthrough use the Friends spell for the handful of important Charisma checks. Given the fact dialogue options are hidden unless you hit the stat benchmark to see them, however, it might be difficult for a new player who isn't using a walkthrough to guess when an NPC.
Planescape: Torment is like a series of min-novel vignettes where being able to read a lot of them is gated behind stat checks (mostly mental attributes like Wisdom, Intelligence, and Charisma).
You can easily get by without Charisma. You'll feel the loss of intelligence, however, Wisdom is the most important stat for unlocking the majority of interesting vignettes and getting the best reactions out of the NPCs and environment.
One reason Wisdom is important is because (if I remember correctly) you get an experience bonus in all situations where you get experience (or at least quest-related ones) that correlates directly to how much Wisdom you have. So you can level up faster and get more levels and therefore more attributes and therefore more unlocks to get more experience and powers and collect more attributes.
So, even in my Mage builds, I start out with lower Intelligence and max Wisdom.