Just to give you a taste of a half elf Paladin with a Barb dillie
Half-Elf Barbarian Toughness I
Cost: 1
ML: 3
Requires: Barbarian Dilettante, Toughness
10 HP – counts as class toughness.
Half-Elf Barbarian Toughness II
Cost: 2
ML: 8
Requires: Barbarian Dilettante, Toughness
10 HP – counts as class toughness.
Half-Elf Barbarian Constitution I
Cost: 2
ML: 9
Requires: Barbarian Dilettante
CON +1
Half-Elf Improved Damage Reduction I
Cost: 2
ML: 5
Requires: Barbarian Dilettante
Improves damage reduction by 1/-
Half-Elf Improved Damage Reduction II
Cost: 4
ML: 11
Requires: Barbarian Dilettante
Improves damage reduction by 1/-
http://forums.ddo.com/showthread.php?t=285720Also, Eladrin is posting some information on Threat numbers in this thread. It could help you plan out what you need to do...
http://forums.ddo.com/showthread.php?&postid=3455315#post3455315