Advice needed!
First session back and the party used the giant's forge in the Pyrefaust to fix sundered weapons and create some magic items, and we had a quick side adventure in Serratine's area.
The eastern portion of J has subsided, creating a pool of lava where the Azers used to be, with the limit of the lava hitting the water in K, filling that portion with steam.
The party is debating what to do next.
They have just hit 11th level and believe themselves to be at least a couple of levels too low to tackle N (most of the time there are between 6-8 party members active).
They have dealt with most of J.
A, B, C, E, G, I, J and M are done (effectively - not all by the party - I have a dungeon-wide story running of which the party is the major component).
Should I push them to K, or through to the elves in H, before letting them gain a few levels and heading back to N?
(I'm going to drop the NPC paladin from the party and have her summonable via a bracelet of friends - she will stay with the Garrison at G until she is likely needed to help with the undead in N - she did 163 hp against Serratine in 1 round with Power Attacks and Smite Evil - and that was without being able to use the critical she rolled because of Serratine being undead - that takes too much of the limelight away from the PC fighters)
Any advice, please?