Would I be stupid to want to roll a second pally?

[DeathsSilkyMist]

If you like the leveling process, go for it! There is nothing wrong with leveling the same class multiple times if you enjoy it. There are plenty of people who do.

Natures defender and a bit more wis won't significantly change your playstyle though, if that was your idea. Clickies, procs, and flowing thought are how you save mana. Being able to cast two or three more spells via 30 more WIS won't make or break you generally. I would advise just focusing on your current character if you want to play a paladin with a heavier focus on spell casting. Save up for some of the more expensive clickies, proc weapons, and Narandi Crown.