First, my reaction to the comic...
I love that Biggles is easy enough to pick out that it's not even an issue wondering which Inquisitors they are (since Fang is fairly generic, at a distance, and Ximenez was based on the real thing). Thanks, Xin, for the goggles.
The real article would be pretty disturbing but the Soft Cushion and the Comfy Chair are somewhat less frightening. Of course if this all comes to blows, I'll be expecting a pillow-poke (with all the stuffing forced up into one end) somewhere in the melee.
Kreistor, it would seem to me that someone on the GK side would need to know *what* to request be produced, regardless of who produces it; that so many natural ingredients for chemical production, specifically many explosives - and of course oil - come from underground and from animal waste, certainly lends weight to the notion that such production could well be a Dirtamancy function. Certainly it's less of a stretch than the notion that the ability to weave baskets extends to production of specific chemicals or combinations, I'd think.
While oil would probably be within a twoll's understanding and thus potentially their capability, they don't seem the sort who'd be bright enough to come up with two-part explosives (or hand-warmers or other items based on a chemical interaction) without someone who'd made a study of chemical reactions to direct them. That being the case, the production of the resources by Sizemore is at least as likely as their production by twollish Dollamancy (bearing in mind it's really more akin to what Ace does than anything else we've seen). Not, I suspect, that it really matters to the story as a whole, unless the only twoll who could make them was poor old Bogroll. Odds are though, the most they could manage would be a special suit of armor or a weapon or somesuch.
Marie probably does more casting before breakfast than most casters do in an entire day. Obviously she did some predictions and made some note (mental or otherwise) of the salient features, or cast something which gives her the updates periodically; so she knows to bring Janis with her (whether, at the time, she knew about the stacking or not). She knows in time that Parson's about to arrive, and that she has to help with Jojo, and now (whether due to remembering what she cast this morning or due to being fed the info just now) she knows Janis will stack with them; or that the alternative means failure, since the nature of predictamancy and its capacity for being balked hasn't been made completely clear yet. I just can't shake the thought that while Janis stacking might be great for Parson, it might not be good for someone willing to take a bullet for either one of them... And while I kind of like Sizemore, that's him. I guess we'll see. I'm also sort of wondering what the link-up of a foolamancer and a predictamancer might accomplish, but I doubt we'll see that. You could probably generate a LOT of useful predictive imaging items, I'd think, and probably some excellent misdirections. Make Marie link with Wanda and you could probably make a death clock like in Futurama
Of course this assemblage also begs a further question I'm fairly sure won't be answered here. Could 5 thinkamancers manage a 9-caster link? (i.e. X-T-X, T-T-T, X-T-X merge into a 3x3 glom) It strikes me that thinkamancers are the ones who keep things straight and manage the coordinated thought process of the gestalt caster, so the concept is that more thinkamancers can bridge larger groups.
It could be insanely powerful if so, allowing the mergence of 5 different casting classes rather than 3, and if it works it's exactly the type of information Charlie might already know and never tell a soul. After all, his archons only get 4 classes, limited at that, so even if it works for him he's at a disadvantage overall once the information's out. (of course it also plays into my notion that Charlie's already a gestalt entity composed of archons and the Dish)