Hey, This is something that I will be doing in the future 100%. I think that it is possible with most setups if you try enough times, but the most consistent is the Ambush/Dagger rogue in my opinion (I'd say that the Chain Arcanist is one of the hardest because getting through the first few cantos is brutal without reliable, repeatable sustain). Here's one of my Impossible Rogue runs done with only the Core set: blightbane.io/deck/1725576011392
Is the BASIC Arcanist; Torch card useful... because I just figured that it DOESN'T inflict regular damage...burns only, so there no way it can be upgraded. :(
It is - it doesn't show on the weapon the way you would expect it to, but if you click on any individual Caduceus, you'll see a [+X] next to the name in the tooltip, which designates the level of upgrades. The game won't let you upgrade a weapon that isn't upgraded. For instance Seer Orbs won't even give you the option at the Blacksmith
Mainly because they are stronger - you can work around this by using cards like Battlecry to get more energy or making the basic attacks cheaper/getting rid of some of them
