Just to clear some misunderstandings: Although I use an STR paladin, I do not dislike SPR builds. However, I think it would be a waste going SPR just for sp regeneration. I do not know how good it scales with skills, or if the MDEF is good enough to warrant a full SPR build. As with CON, were already highly unkillable… being an almost immortal being walking the battlefield has its merits for full CON, but you would also have miserable DPS. (As for how much dmg STR adds, I don’t know… I just use str as a dump stat)
And as for PVP, well were Paladins… and its almost impossible for us. In PVP ranged classes have the advantage due to kiting. The best strategy for us is to actually defend till our enemy’s SP runs out, then slowly pound them until they surrender or die. Our class can outlasts almost any other class there is, aside from other specialized cleric builds.
@Rugpuppet switching weapons to match enemy weakness provides us with +50%dmg and helps us to level abit faster. As to when you should have multiple equips… then it should be as when you can afford it. I’d recommend to get a good main weapon (purple/orange mace) and the best/2ndbest common (Sword and Dagger@Lv120). If INT based, you may want to use a Rod as well. As for Shields, I have an MDef for bosses, and a normal high PDef for mobs. Also, weapon switching is not required… and as I see it, I’m the only Paladin that does this.
As for SP regen, yeah… I think so too… SPRegen Aura + SP Restoration is too good. But, I won’t recommend Diev for non-STR builds, since the main reason of getting the class should be Carve(DPS).
Hope this answers your question.