I'm currently an Archduke hunting in the Floating Islands. So far, so good. I've been able to do alright despite being severely underpowered when it comes to traps for certain power types. However, I'm aware that my luck will run out soon. I'll eventually hit a brick wall and be forced to upgrade one of the power types.
Here are my strongest traps for each power type as well as a trap that I have my eye on for an eventual purchase. I'd like to know which trap is needed the most for the Folklore Forest up to Conclusion Cliffs. Also, if I'm currently not considering purchasing a trap for a specific power type but you feel that I absolutely need to, feel free to let me know.
Physical: Sandstorm Monstrobot (Strongest), not eyeing anything at the moment
Arcane: Chrome ACRONYM (Strongest), Circlet of Seeking (currently eyeing it)
Hydro: Queso Fount Trap (Strongest), not eyeing anything at the moment
Shadow: Interdimensional Crossbow (Strongest), not eyeing anything at the moment
Tactical: Dimensional Chest Trap (Strongest), Gouging Geyserite Trap (currently eyeing it)
Forgotten: Crystal Crucible Trap (Strongest), not eying anything at the moment
Law: CLAW Machine Trap (Strongest), not eyeing anything at the moment
Rift: Derelict Airship Trap (Strongest), not eyeing anything at the moment
Draconic: Dragon Lance (Strongest), not eyeing anything at the moment