Durandan

No, there is no benefit from either the Two weapon fighting or the Dueling feats. Rifles are a single weapon used with two hands, thus it does not meet the prerequisites for Dueling (one single-handed weapon, melee or ranged) or Two weapon fighting (one weapon, melee or ranged, in each hand, or a two-bladed weapon).

What kotorkyle said. It helps if you have a good blaster prepared before you enter the Jekk Jekk Tarr. Just avoid Hanharr and be patient.

An actual change in persona for NPC:s you've turned to light- or dark side. It's rather annoying to find that your followers react the same way to a situation no matter how they are aligned light/dark-wise.

Battle precognition is negated by wearing armor, so you have to wear either robes or clothes to get the bonus.