If somebody at my table said his quasit could use touch attacks without breaking invisibility cause technically he's making the attack, I would slap him so hard his birth certificate disappears.
And I view that as needlessly hostile.
Again, this is a matter of trying to make sure we're all playing the same game. What's
painfully obvious to you may not be that way for someone else. This includes whatever we presume the intentions behind the written rules are. Obviously, using Lucky to turn disadvantage into super-advantage isn't intended behavior. ...except that it specifically
was intended by the developers.
So outright attacking someone for reading the rules and trying to interpret them, because
clearly they're explicitly being malicious and are just trying to game the system instead of following the obvious norm, strikes me as kind of hostile and unconducive to creative play.
You
could just say that "No, the reaction of delivering a spell ("delivery" not being detailed anywhere else in the book to my knowledge)
also breaks invisibility(fiat)/counts as an attack(interpretation)". And that's fine (in addition to covering attack-less touch spells such as Cure Wounds). But aggressively punching someone down because they thought they'd found a useful interaction is just going to discourage people from trying to do anything outside of whatever railroad they think you've intended.
But if you're okay with that and your players are okay with that, then, well, it works for you. It wouldn't work for me. I'm the kind who casts Light (coloring it red) on a coconut and then uses Catapult to launch it into the air as a signal flare (if we don't have someone with a bow on hand).
Glorantha is
the shit. I'll always just automatically associate it with KoDP rather than the RPG though, due to what I was exposed to first. "No, don't bang the pretty naked forest lady.
Do not bang the pretty naked forest lady. ...You fucking fucks, I told you not to bang the pretty naked forest lady, now you've got thorny vines coming out of your earholes."
KoDP might actually be a good place to look for inspiration on RPG adventures, come to think of it. Just look at the hero quests. Mortals learn the old myths and stories, and then enter the realm of the gods to reenact them. You're dealing with very powerful forces, but by adhering to the histories and methods of the gods you can prevail (with notable effect, both in the sense of personal growth and in the sense of political weight with the various tribes).