Icewind Dale II - Help with Characters

[Mummelmann]

Looks a lot better!
The cleric has a low strength score, but this can be easily dealt with by adding stat points (he should have at least 10 base so as to avoid penalties to hit rolls).
The Rogue's CHA is a tad low as well, but again, you can adjust that by adding points to her CHA stat as you go and reach 10 to avoid penalties to quite a few Rogue class skills.
Looks quite balanced, you have melee force to deal with most enemies, a good lockpicker which can be used a decent melee fighter as well and a good healer!
CHA adds a bonus to Turn Undead (Paladin innate ability) among a couple other things but there aren't a whole lot of instances where you'll use that in ID 2.
If you pick the Weapon Finesse feats with your Rogue and Ranger (for the type of weapon(s) you know they'll mostly be using) they'll become fierce at hitting their opponents (I did this with my Rogue as well) as the DEX bonus will apply rather than STR, they have mad DEX scores!
Your Ranger will get basic healing capabilities around level 4-5 and beyond in addition to the Cleric and your Paladin (Lay on Hands is handy in a tight spot) so you have plenty of healing power here!

This group should allow you to complete the game relatively unscathed (for the most part, bosses are tough regardless).
Just a small strategy tip at the end here; if you're having trouble with masses of enemies at once you can exploit the AI a little as the "Fog" of War which limits yours and the enemies' view and aggravate one and one foe at a time.
I usually arm my Rogue with a bow and go slowly forward till I see an enemy and then pause the game and target him and shoot one arrow, he chases the Rogue down and the other group members shoot while he runs towards you and eventually attack head on, allowing the Rogue to slip away and go around to flank the enemy in melee or keep shooting from behind the fighters!
Spells like Entangle are extremely valuable against a larger group of weaker enemies (which in turn have low saving throws) and can turn things around in a big way sometimes!

If you need any other tips feel free to ask (whether it be rule related, feats, skills, equipment etc. or general gameplay tips)!
Have fun and enjoy what is among the top 5 RPG's ever made in my opinion!