Multi-discipline quests: Crafter/Gatherer Defence!

People have been going on about the idea of having to battle through a dungeon to get to a mining point and whatnot, but that's not quite what I mean. That's battling, then it's gathering. It's not both... at least, not simultaneously.

My idea is having crafters/gatherers do their work while being defended by their party members. For example...

A crafter is making an extremely important piece of equipment in a remote location. They are, for example, constructing a cannon in a warzone. But they can't do this without people attacking them, and our dear crafters simply can't manage to defend and craft. So he hires a rag-tag pack of adventurers to help him save the world cannon.

The crafter would not simply have a tiny little thing to do, though. It would make sense that he can't just Hasty Hand and be done in a second! The crafting would take, say, 10 minutes. During that time, stronger enemies would attack, in a larger quantity, and the crafting would increase emnity slightly so the fighters may have to on occasion split slightly to stop any of them from damaging our good man/woman. Once crafted, the crafter could continue to improve the device's quality at no cost to anything. But the fighting would become even more severe over that time, of course... the higher the final quality, the higher the reward. But death of the crafter would mean you lose everything. This would be great for end-game content, as it means you could always be trying to out-do your best result, and SE could add in higher rewards as time progresses, to see if anyone could possibly get something to a high enough quality.

Gathering could work in similar ways. A miner is trying to get valuable resources in a monster-infested world. Botanist, the same thing. A fisher, the same again... fish are resources, after all!

You could even set it up so that you have six people fighting, one gathering resources and one crafting those resources simultaneously. When a gatherer gets something, it adds to the durability of the crafter so he can keep going, perhaps?

Thoughts?

Love your ideas, I just wanted to expand on the options available for gathering. I still want a monster that I can gather from during a fight.

MIN could mine the back of a Coblyn, mine a column in a cave causing a localized cave-in near/above the monster, or flatten the feet of something with their sledgehammer.

BTN could chop the roots of a Treant/Malboro, or scythe off the whiskers off of a Coeurl.

FSH could hook the tongue of a Gigantoad, hook the tail of something that was partially submerged (such as a sandworm halfway in the ground, if his tail happened to end in some water...), fish in a pond granting temporary fish items to throw at the boss that do various things (blowfish temp item to cause paralysis/poison?), or perhaps spearfish the tail of something.

These actions would probably only be available during miniboss/boss monsters, since trash mobs rarely live long enough. These actions could cause a debuff (either permanent or temporary), increase (or force) the drop rate of 1 or more items, grant your party members a temporary item to use in battle, etc.

At this point, I would be happy with just about any cross discipline content. Unfortunately, Yoshida has said he thinks its a bad Idea and doesn't want to do it.