Here's my take on a Pyro build. Highwayman is super interesting with pyro but you have to commit a few cards to make your secondary deal enough damage.
It's not super consistent, I feel like you can get 1 or 2 molotovs per level. Maybe more on levels where you have to defend and take out a lot of riddens.
If you play offensive scav you are going to find even more molotovs. Overall pretty fun deck.
