44K followed by crouch throw does not always work. this move is somehow buggy, it only rly works if you hit a designated side of the targets hitbox. you can try this out in training mode. set the cpus 1st aktion to standart and 2nd to whatever attack. you will kick him, then when you try to grab him the cpu will attack you and your throw will miss even if he is crouching.44K is good for setting up crouch throw, it is also good in wakes, and CH combos.
I wonder no one mentioned 6AA. the 2nd A is safe, and if not blocked it allows a ground throw.