Woohoo! I just solved AI 4x4x4 cube for the first time. Granted, it was lucky (considering 4 previous attempts, where I ended up with two swapped one-colored pieces of fourth 2x2x2 cube), but hey, IÂ´ll take it nontheless.
Now to find out a method how to solve it without getting lucky.
Edit: Done. It took me one day but it was worth it! I changed solving technique a little bit (from 3 solved and 1 unsolved 2x2x2 cubes to two cubes solved + all edges solved, leading only 6 centers to solve). For centers I use extremely long commutators, but at least they are working