After unlocking the first door with the small key, go over to the wooden platforms on the left and pull out the wind waker. Now preform dry storage off of the platform and break the boards to store the cutscene. Note that this trick must be done quickly to save time.
Make sure that you've called Tingle and lower your health to 1/4 of a heart. There are two ledges you can choose to hover to, depending on the items you have and the given situation. In a typical run, you align yourself left of the second-floor ledge directly above the entrance into the main room and use the bombflowers to hover.
In an IL run or a TAS (where you've gotten the deku leaf before completing DRC), you would hover to the ledge by the cage--as the deku leaf allows you to bypass some slower rooms that you'd otherwise have to complete. Having early bombs also allows for more freedom when choosing where you want to start your hover.
Note: Whichever ledge you choose to hover to, beware of troublesome keese and falling rocks!
Simply jump across on the first sidle, then get to the other one. Align yourself and sidehop, jumpslash.
Slash the four ropes on the second level bridge, then wait a few seconds. Go forward then the bridge will break. When you're close to the switch, press B then jump off.
More info to come.
Perform dry storage on the lowest left slab by getting pushed off by the wall and immediately pull out and cancel your wind waker. When you have gotten it, open the chest on the same slab. You are now in storage. Walk up to the boss room and walk up on the right wall. If you are in the right position, Link will jump off a ledge OoB. When he does, perform a jumpslash. If the angle is correct you will now enter the boss room.
Call tingle, then deminish your health to 1/4 heart. Stand on the left side of the bomb flower and align with the right side of the boss door. Do a horizontal slash to hit the bomb flower (make sure your not holding L) and hold L. Zombie hover off of the explosion, and once you are above the boss door overhang heal yourself with a red Ting. Go to either the right of left side and stand on the horns jutting out of the side. Align yourself (more specific alignment to come) and roll or backflip. If done properly you should clip through the ceiling without being crushed and either still be on top of the overhang, or have fallen down, but still remain OoB. Either way, make your way towards the loading zone and jump in.
Pickup the pot on the left side of the boss door and place it on the nearby ledge near the wall. Drop down, sidehop left, and pull yourself up. Pickup the pot again and use C-up to align so that the slant of the left side of the right set of teeth on door is between the E & T in "Return". Press B to drop the pot and drop back down, then sidehop to the left and jump up to grab the ledge. Pause and use pause buffering to get to the frame where Link's feet are straight (for more information on pause buffering such ledge clips and visual aid, click here). Quickly press right on the control stick and A to drop down. Now cue a Tingle Balloon and roll to the loading zone. Once you are there, use a sidehop to get in.