That's an interesting idea - training with the guardian scouts inside the shrines. I didn't realize that they reset after every blood-moon.
The double-bomb thing looks a bit too much for me, at my current skill level.
So far in the story, I've done the Elephant and Bird guardian beasts. Am doing the volcano-lizard one now. It's kind of funny to be cannon-balling that one guy at the beast every now and then. At first, the stage reminded me of Deus Ex - with all the sneaking around, but then the cannon ball got introduced and it's been a whole lot of fun!
Parry - I'm yet to start doing it. It's _hard_. Either that, or I'm pressing the wrong keys.
-chronodekar
There are three of each type of Test of Strength shrine. That's a nice number of ancient weapons and I usually stocked up before taking on tougher enemies, such as the Bosses and mini-boss enemies like the higher tier Lynels, Molduga, Talos, and Hinoxes.
The upgraded Ancient Armor gets a damage bonus for these types of weapons as well, and you can stack damage on top of that with damage boosting food like bananas. You can't buff the Barbarian Armor with food, as it maxes out your damage stat. However, the Ancient armor is a separate buff that only impacts ancient weapons, and thus can be stacked for additional damage using food that buffs your base damage stat.
You don't really need to bother with the lesser shrines once you can beat the higher tier ones. The weapon quality varies, with the Moderate shrines dropping + weapons and the Major shrines dropping ++ weapons.
Just stock up on food for training, focusing on defense rather than attack as you actually don't want to kill them too quickly while you're training.
I usually go to the Necludia region around the Dueling Peaks to find Iron Shrooms. They usually grow in wooded areas.
Also, farming Dragon Horns is a thing you should be doing. The easiest Dragon to Farm is the electric one. You'll need all sorts of dragon parts for crafting later, but for now you just want the horns for making meals.
The reason for this is that adding a dragon horn to any food dish guarantees a 30 minute duration. This doesn't do any good for healing food, but adding it to a x3 banana or x3 ironshroom dish will max out your offense or defense for 30 minutes. I usually add a health recovery food item as well, as it's a waste to add another dragon horn, banana, or ironshroom anyway and a little bit of extra health won't hurt anything.
The dragon should appear near to the fast travel point next to the big wooden bridge in the Faron region in the morning. That's actually right where it spawns just north of the bridge and flies around that area for a bit before moving on to the area around Hyrule Bridge where it vanishes again. Just wait on the bridge and shoot it from there as it passes right by it and is an easy target.
The fast travel point is an inn in the woods on the western side of the bridge and is kind of hard to miss.
Shoot the dragon anywhere on the body to get a scale. It will probably land in the water, but will float there pretty much indefinitely. You may need to use the campfire/cooking pot by the inn a few times to get the dragon to spawn, but it shouldn't take too long.
To make shooting the dragon accurately easier, I recommend getting the Golden Bow from the cave to the north west of Gerudo tower. You'll need to climb a bit to reach it, but it shouldn't be a problem. It's in a cave with a boulder blocking the way in a small plateau just past the cliff wall you can reach by jumping from the top of the tower, gliding over, and climbing a bit.
Use magnesis to grab the metal boulder at the top of the plateau, and then use it to push the boulder blocking the path out of the way at the base of the plateau. Inside is a golden bow that respawns every bloodmoon, along with some other Gerudo weapons, including a shield, spear, and sword.
While not the most powerful bow, it actually does decent damage, but also has a really nice zoom and longer range that helps with dragon farming a lot. It is hands down my favorite dragon farming bow for any of the three dragons.
I recommend grabbing two or three Golden Bows before farming the dragon. There is a spot right where it spawns that you can camp out at and shoot it right when it spawns if you bring along firewood so you can set up a camping spot. However, I prefer to just wait for it to pass under the bridge and shoot it then, using the campsite at the nearby inn instead.
Once you have a scale, you need to activate the Spring of Courage. Follow the river in the northern part of Faron region and go north of the head of the river, it looks like an open mouth.
Once activated, the dragon will spawn every day and follow the same path through the area. It only spawns once a day, and you can only shoot one piece of it off per day. So, shoot the horn to get a piece off, go down and get it as it will always land somewhere in the water, and then fast travel back to the inn and wait until the next day. Repeat until you have several.
Watch out for the lightning balls it spawns. If you have the rubber suit, use that for some added insurance if you want, if not, it shouldn't kill you unless you're super careless.
You can actually shoot several pieces off and just wait at the inn to respawn the dragon a few times before going down to get them. They don't despawn and will float in the water indefinitely. There is a limit to how many can be floating around at once, but it's several. I forget the exact number, but you should be able to shoot off several parts and retrieve them at your leisure.
You can also farm the ice dragon at the gate in the north where you find a memory, but I prefer the lightning dragon if I don't need a specific dragon piece and just want horns for cooking because it is right next to a fast travel point and an inn. Which means a cooking pot and fire that you can wait at without using your own resources outside of maybe needing to light it on occasion if it rains. So have some way to make fire.
If you miss and get the wrong dragon part, just grab it and hang onto it, as it will be useful in for crafting later on. They also sell for a fair amount of rupees, but honestly money is easy enough to obtain that it's better to just hang onto it to save you some time when you're farming for upgrades later.
If you do decide to just make a campfire and farm that way, use bombs to get lumber rather than wasting your weapon durability on trees. This is true of gathering lumber in general. The same goes for ore deposits. You don't need to carry around axes or hammers, just bomb them both.
I think using tools gets a slightly higher yield in drops, but I still think bombing is actually faster and thus more efficient.