-Theoretically, the only 3 useful traps are the fire, barbed wire, and poison trap since they either hurt, inflict useful status debunks or both. The other two are weapon specific. That said, traps are useless anyway, so save your research points.
-The only two useful weapons are Dreadsteel and Radiance, since they come with more reliable stun options. The hammer only has one copy of bash built in. And the lustspell staff isn't consistent enough, but probably still viable.
-The price to reanimate corpses scales with their market price, so you can raise a corpse for free if the market won't take them for any kind of profit.
-Pretty much every room type is useful so get them when you can.
-The only two useful weapons are Dreadsteel and Radiance, since they come with more reliable stun options. The hammer only has one copy of bash built in. And the lustspell staff isn't consistent enough, but probably still viable.
-The price to reanimate corpses scales with their market price, so you can raise a corpse for free if the market won't take them for any kind of profit.
-Pretty much every room type is useful so get them when you can.