Ok…
I got my archers to stop switching by using the "Custom (default)" script.
So, now, most fights take care of themselves. The non-story fights are generally trivially easy with 3 decent archers
I could never play this game without AI scripts, as I'd be bored to tears. Only the most important fights are interesting/challenging enough for manual control.
I'm very lazy in that way.
The Kensai is pretty decent so far (I'm level 6). I play on "Core" rules - and it seems reasonably balanced. As per standard 2nd Edition games - you need to get to 2-3 level ASAP - to stop the silly critical hit deaths every 2 minutes.
Party setup (for those interested):
Casus Lond (That's me) - Kensai - Dual wielding Bastard Swords
Jaheira - Fighter/Druid - Quarterstaff (I will be switching to Scimitar/Shield for tanking)
Khalid - Fighter - Longbow (Comp. Longbow when I get STR bracers)
Minsc - Magical Longbow (Some +2 DAM/HIT thingy I found)
Imoen - Thief - Shortbow +1
Dynaheir - Mage (Invoker) - Mostly magic missiles/fireball
Game holds up marvellously - with plenty of open world exploration and hidden stuff. The writing is pretty weak/silly for most NPCs - but it's entertaining enough.
I find it has a very good rythm of linear/non-linear gameplay. I know BG2 is much more linear - but I'm hoping the story/locations will make up for it. I never got much beyond the starter dungeon in the past.
The irony…. I have Mass Effect, Baldur's Gate and Dragon Age installed as pretty much my only games right now. I really, really dislike what Bioware has become - but there's no denying they used to be great developers. Probably the reason why I'm extra disappointed by their latest crap.