| LucidiuS |
I assume you are meaning the 7th level Barbarian/Sorceress, and the 7th level Wizard/Rogue are basically two characters mashed into one each from the way you describe it, so basically the equivalent of fourteen levels of abilities and seven levels of bonus.
You have given the PCs a fair amount. You should find fair ways to take it from them. Utilize dead magic zones, attack their movement and speed, cursed items can be helpful(they won't mind grabbing more loot, so they may not notice right away). Utilize the Cleric's god if s/he has one. If a challenge is too easy, limit the rewards they receive from it.I use traps so much my players always search for them(slows them down). Target your players weak saves with your casters. SR and DR are musts for enemies at this level of the game. Continually antagonize the party so they need to expend any healing that they have