Chain Smoking Rex

My standard Rex build. Lucky Cigarette case works perfectly with his ability. You have Elusive and "I've got a plan!" for enemy management along with all of the clue gathering you will need.

As for upgrades, make sure to complete Strange Solution ASAP to get the offensive type. Higher Education is important as well. Following that, Magnifying Glass upgraded is solid as is Shortcut or Pathfinder in place of Shortcut. Deduction is also an excellent choice to upgrade next. Preposterous Sketches could become Cryptic Research. At that point Emergency Cache to refill your Strange Solution is great. Finally Working a Hunch could be replaced with Deciphered Reality.

The skill slots in this deck are flexible. Eureka! could be replaced with any skill of your choice. You could always swap out Strange Solution for Archaic Glyphs to upgrade into the Guiding Stones version for less offense and better clue gathering. This would largely depend on preference and party makeup.