So I'm building a knife master halfling rogue for PFS and I'm not sure whether to do two dagger fighting or have one dagger and a free hand for other actions. The rogue will have a twin brother (who is also a rogue) played by a friend. we plan on taking teamwork feats for extra flanking aid and the twin will be doing two-weapon fighting. I'm just not sure what kind of bonuses I can get from not two-weapon fighting. For clarity both rogues are unchained.
Tl;Dr is one-weapon fighting just as good as two-weapon fighting for a rogue