Ok heres the party so far...
I decided to model it after my 2nd edition party:
blade
sorceror
ranger/cleric
archer
f/m/t
kensai/druid
ok so each member...
blade:
Must - dual wield, sing, pick pockets, identify items, and rapid access to spells.
Impossible to translate exactly as bard has more limited spells in IWD2 than 2nd edition rules.
BardX
sorceror:
translates well. Sorceror X
ranger/cleric:
translates very poorly. Druid is totally different... More of an avenger kit. cleric is kind of a built in fighter/cleric of 2nd edition..
so I will make it a Ranger1 silverstar X
Kensai/Druid :
translates horribly. What I had was a figher who couldn't be hit (ironskins). Sounds like mirror imaged fighter to me...with summoning and healing too...a druid is a built in warrior/summoner healer.
Illusionist5 Druid X (will also let me try out the weidu wild shapes

)
Start as Druid level to druid 7 Next level you would get ironskins so level as Illusionist5. Then Druid 21. To finish off you get to decide between illusionist 9, Barb4, figher4 etc...
Archer:
I don't know why people say a straight fighter is the best archer? Yes you need a warrior class. Bard loses out on BAB...
But why not take 10 fighter levels for feats and WS... You WILL get your archery feats and have plenty left over. Now take Ranger 20 for level 4 spells and 5 favored enemies (choose casters or other annoying beasts) + heretics bane. You will take precise shot so you don't need strength and can afford the 14 wisdom to actually cast the albeit less than desirable spells.
F/M/T:
hard to multi-class without penalties AND high level mage stuff
Rogue has the nice AB progression. Why not scrap the fighter part? But I'm bored of the rogue10/mage20...
I'll try demarch of mask/thief since mask has the illusion school mage spells which were so essential to the thief
You need to pick locks and disarm traps and have concentration so a human with 14 intelligence or drow female with 16 can do it 5 skill points...
Note: (search can be handled by the ranger archer)
Rogue1Monk1DemarchX (Lawful Evil)
myrophine