You cannot maneuver your blocks against that. So leave your blocks of infantry home.
Take two cannons, a helblaster, and one mage. Fill the rest with ridiculous amount of shooting. Crossbowmen, Archers, and Halflings! (Halflings are really good shooters in 4/5th ed.) Corner. Target his characters and those Waywatchers.
Also/alternatively you can take several steam tanks. At 200pts per unit you could probably have four in addition to your one character. But you can be kind and only take two in a 1000pts list, against her/his two flying characters.
I mean s/he has gone to one extreme with her/his list, you can go to your extreme.
Herohammer is so silly.
-Z