Thanks for the clarification, cp, but i know how the back down trick works, i just thought that when you enter the big vertical room, before old MB's one, Samus land in the top platform, and you use that turn around trick to make her fall, but it doesn't seem the case and you just touch it or something like that, right?
Anyway, i've been talking with hero of the day about this and decided to post it here as well.
Dessyreqt, a realtime speedrunner came up with a route that he said to be faster both in-game time and realtime. Actually he said he uses a program to bruteforce the game searching for possible routes and the results were over 1000 different possibilities with the route i'm describing below as the fastest one, as i said, both in-game time and realtime.
The route changes after Wrecked Ship. You would go for Crateria Shaft, get the Missile pack in the left, below the save room, then go down to the big fall and get the Super Missile above old MB's room. Fall again through the shaft and get the Missile pack in old MB's room. Then proceed to clean the right side of Blue Brinstar, and then goes straight to Green Brinstar, getting the Power Bomb pack in the way. Now get the Missile pack in green brinstar, inside of the fake bug's pipe and then proceed to Maridia (of course, getting the X-ray in the way in TAS conditions). After the Norfair clean up you should proceed to Pink Brinstar to clean up and then for the elevator. Then go for the Power Bomb pack in the landing site and then for the gauntlet area. And finally to Torian.
It doesn't seem to me this route would be faster, mainly because you would have less equipment to speed up Blue Brinstar and when you're going for Pink Brinstar clean up, you couldn't use the new equipments to speed up that area because the possible tricks are too hard to pull off in realtime. Also, going for blue brinstar and from there to Maridia would let you with 1 less Super Missile pack (iirc).
Well, for TAS conditions i thought that this route could be maybe something to look into, first because you can use better alternatives to speedup the blue brinstar area that realtime runners couldn't. Also you could take full advantage of the new equipments for cleaning the Pink Brinstar area and also, something i've just realized and what actually made me post this is that you could avoid a back track in the original route posted by dessyreqts, that again, a realtime runner couldn't. The idea would be to go for the gauntlet after Wrecked Ship as usual, then, after that you would proceed to Crateria shaft, avoiding two back tracks, one up in the green pirates zigue zague room when you were supposed to climb it going to the landing site area for the power bomb pack, and another one by not having to go from the entrance of the crateria shaft to the landing site, again for the Power Bomb pack.
I'd like to know your thoughts about this.
Edit: Btw, something i just realized to be another huge advantage over the realtime route, is the fact that you can use the upper exit after collecting the Pink Brinstar Power Bomb pack, which not only is faster but avoid the path that would leads Samus to a big back track. That alone would be a huge time saver over the realtime run suggested by Dessyreqt.