The reason you would want to Solo with JUST your main character all the way through would be that all of the experience for whatever quest would go SOLEY to your character instead of being split between all 6 ???? And then from there just have the assorted NPC's join your party just long enough to get their specific quests ???
Also.... ASIDE from using a trainer , is there any way to remove the experience cap ?? I know that there ARE ways out there, but I am by no means interested in using any kind of trainer...
Thanks for the time to answer a silly question !!!