One way of maximizing your HP in Planescape: Torment is to take fighter levels. After all, if you go from mage level 4 to mage level 5, you get d4 + con bonus HP, and if you then go from fighter 4 to fighter 5, you get just one HP, for a total of d4 + 1 + con. If you go from fighter 4 to fighter 5, THEN from mage 4 to mage 5, then you get d10 + 1 + con. The only exception to this is going from level 9 to level 10, where if you're a thief or mage you get d6 + con or d4 + con, respectively, whereas as a fighter you automatically get 3 + con. (for levels 10+, fighters get 3 + con, thieves 2 + con, and magi 1 + con)
Do you use this method for max/min-ing your character? It's kinda labor intensive, and it's somewhat of a metagaming, munchkin-y thing to do. I'm doing it this time through, though. I'm going as chaotic good rather than lawful good, so I'm missing the two constitution bonuses from the tears of Salieru-Dei and the strength bonus from Vhailor, so I figure it's okay to use a few slightly dubious techniques to max my HP
Another question on levelling-up patterns: what's your favorite class specialization bonus?
Fighter: first +1 strength, allow 4 weapon proficiency, second +1 strenght, +1 constitution, +3 HP, allow 5 weapon proficiency.
Thief: first +1 dexterity, second +2 dexterity, +1 luck.
Mage: first +1 int, second +2 int, +1 wis, +5 lore
I prefer the thief specialization, personally, because I often start out a bit short of dex, and also luck is a tough stat to come by otherwise, except for short-lived spells, and it's fairly powerful.
So the pattern of my levelling up (in terms of the first class to reach the level) is generally something like
4: fighter
5: fighter
6: fighter
7: thief
8: fighter
9: fighter
10: thief
11: fighter
12: thief
13+: fighter
I stop taking new levels in thief after the 12th, because, really, who needs them? After the twelfth level, I take fighter and mage levels about equally, but I make sure fighter gets there first.
So, which class do you generally specialize in?