When Zelda tries to throw a ball of energy at you, get under her and use a quick spin, or regular spin attack, to knock it back at her. Instead of trying to rally it back and forth, it will hit her immediately. It should be noted that the triforce attack is slower than the stab attack, if you get it you should roll out and C-Up to look away and reduce lag. The minimum cycles in 7 and the highest seen is 15. It is also good to know that you will never get two balls of energy in a row unless the previous one was wasted.
This strategy is also a 3 cycle however it removes the portal RNG, it is faster than everything else (even perfect 4 portals). To do it, jump attack, deal 4 hits individually and then a full combo (mashing attacks) (8 slashes in total). After the first cycle, roll to the corner shown in the video and line yourself parallel to the wall to your right and wait for beast ganon to spawn ahead of you. Once he jumps back start counting the drops of light falling from his belly as visual ques for when to throw the B&C, ideally you will throw it after the 2nd drop once he has backed up, if you throw too early you will have to go left which means using a JS to get through the small gap as shown in the video. After the 2nd cycle transform to Wolf and finish Beast Ganon off with one single attack.
To make Ganondorf go into his "running away" state you need him to attempt to hit you, to start you should dash twice past him on the left so he misses you and goes in front of you. From here there are three paths he can take, gentle turn left, sharp turn left and straight ahead.
If you get the gentle turn left (A in video) it is very easy, just follow close behind and shot, spin, repeat
If you get either sharp turn left or straight ahead after the first hit it is recommended to instantly dash, this delays zelda and makes her less likely to miss as he turns.
Run at Ganondorf without targeting him, and use a sword slash. Ganondorf will simply block it, but this gives you time to get behind him and hit him with a jump attack - spin combo. Get behind him before he gets back up and use another jump attack - spin combo. Repeat this process and after the third time press A to finish.