Erloth the Dagger's page

I've got a few questions concerning Wu Shen that I'm simply not getting:

-She's got backstab like Merisiel but she also gets to add the poison trait as well to the check. What is the advantage to this? Unless a monster has a weakness to poison I can't see any real benefit here.
-On her turn, she can discard a card to evade a boon and may immediately explore again. Does this just help her to explore more? Why would you evade a boon? I assume if its one you don't need or want.

I know these sound like stupid questions but I'm not really getting the theme of her powers here.

I'm was playing Black Tower of adventure 4 tonight with Merisiel and a question came up:

Okay I had one location closed with two left. I explored at the location I was at and drew a henchman. I decided to evade the henchman and leave it on top. On my next turn I moved to the other open location. After a few explorations I drew the villain. I ended up beating the villain causing him to flee to the last remaining open location. My question is does that henchman, that was on top, stay on top after the villain is shuffled into the the deck?

Looks like this version of Merisiel gets a new ability that gives her the skill -- Melee: Dexterity +1 when she plays a weapon with the Finesse trait. My question is will future skill feats in DEX add to the bonus? For example say she has DEX +3. Would she be able to use her finesse ability as DEX +4?

How many 1st level spells can a 1st level wizard prepare per day? According to the hero's handbook it says 2 if your INT is 12+. But in hero lab its giving me 3 spells. I'm not sure where I'm making the mistake.

Finally finished Hook Mointain Massacre solo. I have no idea which role to choose. What are the strengths of each? Is one better for solo play? Thanks.