Is it okay to critique/educate on a matter of grammar, or would that be unwelcome?

Yeah sure go ahead. My grammar is pretty bad.

No, this is one of those obscure things that trips up lots of people. What to do with 'yours' as a possessive while it's also in a list. "you'res" isn't a word, since "you're" is just a contraction of "you are". But then you get lots of folks that try "your's", which also isn't accurate.

So correct ways of making that type of statement would be like "Yours and Bob's trucks" OR "Your and Bob's trucks". Which one is preferred is kind of a UK English vs US English detail. Personally I lean towards the former.

But to a lot of people, even that sounds really weird. It FEELS like it should be wrong, so what we often do instead is something like "Your truck and Bob's." or "Bob's truck and yours." which sound much better. So in this case what I'd recommend is exactly that for the sake of flow: "I was hoping that Falith's knowledge and yours would aid us-" or "I was hoping that the knowledge you and Falith possess would aid us-"

Anyhow, I hope this helps, and is received in the constructive fashion in which it was intended. Keep on keeping on, I do like your comic. ;)

Oh thank you! That's something I have tried to google at one point but I didn't get clear answers.
Really appreciate the explanation, I'll make a correction and try and make a mental note of that.

Weasel witchcraft...
It's funny, I've just procured a book all about weasels and similar mustelid species in Finnish and general European folk traditions and magics. Unfortunately, the book is entirely in German, so I'm having a slow go at translating it, but there's already some neat stuff I can kind of make out.

Oh wow that sounds really cool! Good luck translating it, sounds like it will have interesting stuff in there.
Would love to have a look at the translations if you don't mind sharing once you're done!

Drop me a reminder in or around the end of June, and I should have everything in reasonably good shape!

I'm working on a presentation for a comparative mythology class in July, all about weasels (and stoats, ferrets/polecats) in Indo-European cultures, with a few asides in other cultures. One of the asides will definitely be the Western Anishinaabe (a.k.a. Chippeway) story of how Weasel saved the Trickster from being eaten by a cannibalistic monster, a Windigo: Weasel dove up the Windigo's anus, crawled deeper until reaching its heart, then tore it to shreds.