Q:
D/D & Stacking Sigils
Only one stackable sigil type will function at a time (by design to keep things equal for two-handers) although I’ve noticed that two identical sigils will stack twice as fast. Stick the one you want on your main hand and something non-stackable for your off-hand.
Hermits have no peer pressure.
Yep. You can put two of the same type to stack twice as fast, but unless you’re getting downed a lot it’s better to pick one stacking buff and one passive for your offhand. 5% damage is an obvious choice for a lot of classes, although it’s questionable for ele because it doesn’t modify condition damage.