The biggest problem i've had with canonist is that my opponents always have the exact right answer for it every single time. a K.command really sets us back to 0-land pretty quick, and it has 2 modes that can hit canonist. the really irritating thing about K.command is that it's not blue without a painter in play, so only spellskite works against it. Maybe i'm just too impatient and end up jamming them in before i'm ready, and i can definitely appreciate that i'm not nearly as good a painter as y'all are (and definitely can't hold a bristle up against mr keller or even bob ross).
Then again, i just re-read the post, and it's specifically about xerox decks. I'm not 100% familiar with these, but they're basically a family of deck archetypes that cheat on lands, right? so any deck using from say 10-19 lands main deck? I think in those cases, i can see canonist being extremely good, since they're not going to be able to both guarantee land-drop AND find removal. It would also be a pain against high tide, since it's both a clock and a hoser.
oh and sulfur elemental is a BOSS (as in when it's relevant). I'm guessing my opponent had no idea what was going on when i landed painter naming white, but it nukes pretty much all token strategies (outside of marit lage), and to an extent, DnT.
Just curious, outside of hosing swords by naming whatever colour protection that sword gives, is there any other reason to name another colour outside of blue or white? Also, i think there's probably a reasonable argument to up the number of moms here. i think a split of 3 welders and 3-4 moms might even be appropriate. In my somewhat limited experience, i've found that protecting my board is a heck of a lot harder to do than the master painters make it look. Just having silver bullet answers means that we're significantly more likely to lock the game down (a bit), but it also means that if they get removed, we're pretty boned. Most of the time, each plow or push or edict or k.command they point at us can be flashed back again, so we're dealing with what i'd consider to be a heck of a lot. More moms means we can blank more of their removal. a mom + canonist means they can only chuck one at us every turn. but if they manage to sword our one-of mom early enough, it's a pretty tough hill to climb from there.
Or what do you guys think? I was tempted to even put in a cheeky one-of
Akroma's Memorial as a copter-pitch target to weld into play (i get that it's not good!).