Alright, so
-Level 5 Bard persona with a drum for running somewhere out-of-the-way, preferably with a centralized Origin like Freeport (though even this is sounding situationally useful at best since you can just do an Origin persona)
-Level 5 Iksar persona (if not Iksar) for switching over and Origining to get to Kunark zones quicker
-Level 5 Barbarian persona (if not Barbarian) for switching over and Origining to get to Permafrost raids quicker
-Level 5 Ogre persona (etc etc etc) for Fear raids and Guk (or can do a Troll too if you're lazy and want to use the extra slot)
Bam, ghetto teleports and quick getting-around.
I don't know how people will level personae from 111-115 in Torment of Velious (can't remember if this was also the case for 116-120, and never played 121-125) because of this. Most of your EXP post-110 is from achievements, missions, collection sets. All of those will be used up when you do them once, so your personae will be left with... mob-grinding and overseer tasks? That sounds like hell. The mob grinding will be nearly useless so people will end up only logging in once a day to do the overseer, get their 10% of a level or whatever, and log out.
Well, my cool idea to dual-class Paladin and SK is losing steam by the minute.