So Here's how I wanted to do my character Setup:
Prophecies Characters:
Elementalist = LDoA title
Factions Characters:
Necromancer = Faster MM build Skills
Assassin = cant start anywhere else
Nightfall Characters:
Dervish = cant start anywhere else
Warrior = fastest to lvl 20
Ranger = fastest to lvl 20
Monk = fastest to lvl 20
PvP Characters:
Ritualist = storage
Not-Using Characters: (mainly because I'll need two PvP Slots Open
Mesmer
Paragon
Ritualist [PvE] (well I might make one)
So What I wanted to do was have Factions characters made there (to level 20) --> Nightfall (just heroes/skills) --> Prophecies (protector title) --> Factions (protector title) --> Nightfall (protector Title)
Any opinions on what characters should be made in each campaign?

just buy more slots, so you can do it all. Besides you will still need one mule per male character, and 2 per female (afterall, women need larger closets). So, If you already have 8 slots I highly recommend you buy 12 to 22 more (depending on character genders).