I voted for Vanessa - and here's why.

First, assuming she gets to use her adds - they're alive and can think for themselves. They aren't mindless zombies and can, in theory, work together.

Second, as much as I like Zanzil, I don't think his abilities are interesting enough to defeat her. Sure, he can fill the room with gas but she's a Rogue and moves quickly. If he's going to be able to raise zombies she should be able to, at least, set things on fire - even if she can't blow them up. He just doesn't do enough - he's too reliant on his adds - which she should be able to make quick work of with things like Blackslash and Deadly Blades. Add the red cauldron to that and she'll tear up the adds like an old "Edwin VanCleef Wanted Poster".

I can easily see Zanzil winning, after last season's Vanessa fiasco and also with a bunch of people voting AGAINST Vanessa more than voting for Zanzil. I think in a fair fight (HA!) she could win but it looks like she won't even get that. It doesn't sound like the rules are allowing her to to have her adds or many of the other abilities that she would need to counter Zanzil. He might be a witchdoctor but she's beyond the realm of sanity and that makes her even more dangerous.

Disclaimer: I am male and I am straight. Sure, she's cute but she's underage AND she's psychotic. I don't think I'd want to touch her any more than I'd want to touch Sylvanas.