Yeah it's one quest,
this one, need 3 jeuno rep so I did
this quest and bought 48 stacks of corn from sandy.. it's not so bad actually cause I got 120 gil for each trade of 3 corn from the quest, and 3 corn cost me 147 gil, so the cost is actually pretty minimal. You only actually need rep 3, which would be 24 stacks, but I didn't want to go all the way to Jeuno to check my rep so I did overkill.
I used
this timer to find out (bottom left, show more lines) when Male Taru time would be, went to the dungeon ahead of time and farmed keys, can mail them to yourself with NPC next to auction house so you can have all 4 sitting in your delivery box. I did
Researchers from the West and enough of
Middle Lands Investigation to warp to Konschtat and get to Gusgen mines quickly. So my process was get warp to Konschatat from Ra'lude gardens with key and instant warp in inventory, walk to Gusgen, go north all the way until I enter the treasure area, find chest, trade key, warp out (can take book out of if you forget it but I wanted to save time), trade magical pattern (guaranteed to get from chest if you have quest active) to Guttrix, he lets you pick one of 4 feet/legs/arms/body armor, then I went back to Ra'lude gardens(with new key picked up), warped to Konschtat and did the whole thing over.
I basically prepared all week just to be able to do it quickly, I'm sure some stuff I did was probably not most efficient, but still, happy I was able to get it.
Every day I discover some other super useful FFXI site, I wish more info between them would overlap. Though at this time, clicking on treasure causes an error on the page for me.
Edit: Wow, fuck. I went to get La Theine's warp point, and I went all the way through Ordelle, twisting and turning all over the place, I notice a level like 32 Water Elemental next to the exit that has the warp point and I go to fight it, but then some Bombast monster was there I didn't notice among all the completely identical bombs that killed me, now I gotta go through that whole thing again, why can't warp points be like the Konschtat one, where you just go to a point on the map, going through the entire dungeon is a pain in the ass v_v