Scenario: the party is level 10/11, and comprises: Lvl 11 Druid, Lvl 10 Ranger/Scout, Lvl 10 Barbarian/Rogue, Lvl 10 Evoker/Fighter/Bladesinger (useless), and my Lvl 10 Cleric/RSoP. While in a Drow city, it became necessary for the Barb/rogue, the Bladesinger, and the Cleric to QUICKLY be elsewhere.
So, the Cleric cast Plane Shift, and we went to Elysium. Yay! Not just safety, but it's also where Pelor chills.
Of course, the Druid and the Ranger are still down in the Drow city. Summoning a friendly Hound Archon at least let me notify them of where we went, but getting the party back together is proving difficult for me to figure out. We plane shifted back, and with some pretty good accuracy - we're only 50 miles off of the Dwarf city where we entered the Underdark (as I declined to aim for a point IN the underdark, with a spell that scatters you 5-500 MILES off target). The arcane caster is completely useless - he has zero spells for transport/travel/summoning/messaging/anything but inflicting HP damage.
So, resources: one lvl 10 Cleric spell list, one lvl 11 Druid spell list.
Problem: how do we reunite a party that's probably about 120 miles apart, with 40% of it currently in the (VERY DANGEROUS) Underdark?