Thaddius Brood is not always the obvious choice.
If Fog-of-War is the rule AND you're able to choose Kelya Frendul as your summoner, you'll be surprised to find that this summoner should be your not-so-obvious first choice.
Here's what your line-up should look like:
Albatross
Chaos Agent
River Nymph
Ice Pixie
As you can see during my battle, I had a brain fart, and totally forgot about the Fog-of-War rule.
Regardless, the shield ability that Keyla Frendul provides still would've been valuable to protect against the sneak ability of my Undead Badger even without the Fog-of-War rule.