Quick question. Can a warlock using mystic bolts benefit from the two-weapon defense feat?
From the entry on mystic bolts:
Creating a mystic bolt requires the hand to be free, but the bolt appears only briefly, so a warlock using mystic bolts has a free hand any time she isn’t attacking with a mystic bolt. The warlock threatens with a mystic bolt, but only if she has a hand free. Because mystic bolts are impermanent, a spell that targets a single weapon (like magic weapon) can’t affect it, nor can a mystic bolt be made with magic weapon special abilities. Abilities that affect all weapon attacks the warlock makes, such as the arcane striker warlock talent, function with mystic bolts.
Two-Weapon Defense:
When wielding a double weapon or two weapons (not including natural weapons or unarmed strikes), you gain a +1 shield bonus to your AC.
When you are fighting defensively or using the total defense action, this shield bonus increases to +2.
Basically, it comes down to this: When not actually attacking, is the warlock still considered to be wielding two weapons? I can see it being no because they're not currently manifested, but I can also see it being yes because the warlock threatens with them.