The succubus was more rogue and sorcerer oriented and maxed the hell out of her charisma. Her main "attack" was a wand of Whirling Blade, a level 2 spell from spell compendium to attack every creature in a 60 ft line with a slashing melee weapon. Except you use your charisma for attack and damage. She had a +12 charisma bonus (I think she was also a half vampire), so a line attack with that was actually quite devastating.
Nice tactic, but I'm not sure about one thing.
SRD said:Magic items produce spells or spell-like effects. For a saving throw against a spell or spell-like effect from a magic item, the DC is 10 + the level of the spell or effect + the ability modifier of the minimum ability score needed to cast that level of spell.
Wouldn't the attack use the wand's cha bonus, which is the minimum needed to cast a 2nd level spell?