[Jellyfish]

Do you only want Mr. Gimli? If you do, just ignore my issues.lol
For fighter classes(fighter,ranger,paladin,barbarian), you have 1 bab on level 1, and you keep gaining one bab on each lv.
For classes likecleric, thief, bard, monk and druid, you have 0 bab on first level, and you get 3 bab for each 4 levels.
For wizards and sorcerors, you have 0 bab on first level and you get 1 bab for each 2 levels.

The least number is +1 for each attack basically.When your bab reaches 6, you have one extra attack number each turn, but you have penalty of -5 attack role for the second attack. So it makes +6/+1.
Similarly, you get your second, third or even more attack numbers as your bab is increasing. for example, a lv 16 fighter has 16 bab, so it should be +16/+11/+6/+1. you will have 4 attack number then.

However, monks use a different way to count the attack number. It is -4 for each attack per round, not -5. And remember, it only counts like that when you are using your fists. It is a big advantage for monks.

IWD2 has a bug that makes a monk's bab get messed up when you have some other class's bab added to the total bab.( You must have at least one bab from other class, and only lv 1 fighter classes will have one bab while other classes have none.) Your monk's attack number will be just like you are using weapons even when you are attacking with your fists.(-5)

Using rogue's sneak attack with monk is a good point in nwn, but not in iwd2, since the bab bug is there. LV1 rogue and lv x monk? Why do you choose that?
Do you want to get rogue's skill bounus at lv1? well, that is considerable, but I won't do that because the monk will never reach level 30 and one level higher sometimes means a lot.( Like lv15 and lv16 monks, their damage of fists are quite different.)

Lv8 sor and lvx monk? Tell me your thinking about this class please.
I used to develop lv1 monk lvx sor.lol