It doesn't really matter since you won't use Soul Driver past 4th job anyways. And SD isn't -that- great of a skill to begin with.
Fighter-Crusader-Hero
You get boosted damage with (advanced) combo and is a good AoE mob skill since you lack a decent one (Shout is mainly used for the stunning)
Page-White Knight-Paladin
The most popular choice it seems. You can do AoE elemental damage and you also lack an AoE skill to begin with.
Spearman-Dragon Knight-Dark Knight
Just another attack in your arsenal.