Tbh there is nothing gained from cheap defence. It’s deskilling you as a player. I skip them sometimes even. Not even worth experimenting on really. A break is all they give I guess…
My judgement is clouded though…
Last week I lost to Treasure Gnome, Festival Cow, Fire bomb and Daemonicom (sp?).
I cast Tomb Robber on a heavy skull board, killed treasure gnome and cow. Ai cast - got a doom or bone storm and a Webspinner. A board full of skull traps. Webspinner killed 3 troops and a few turns later I lost in a pitched battle with hero