Besides playing Advanced Mode. What do people do to make Baron Blade more difficult?
What I've done before is start the game with H -1 Blade Battalions in play. He becomes very difficult this way.
Play against Mad Bomber Blade.
I've done a few things:
1: Up the number of cards he discard each turn, even higher than advanced if you want.
2: Put 2 platforms in play to start.
3: on his second side give him an additional card play.
Make Living Force Field and Backlash Field Indestructable.
Harder, not made of evil. Wow man, that would be harsh.
Just play Bunker, Ra, and Haka, against him, and you get the same result.
When I was experimenting with the Blade Battalion start, I also threw in a Powered Remote Turret. Baron Blade took my team out in 4 or 5 turns.
I've found that his side A advanced mode is just about the right speed to keep the pressure high and the players on their toes. However, once he flips he is pretty terrible.
My house rule is on his side B he hits both the highest and lowest hero for H damage (Instead of just the highest). This makes him harder without making him impossible.