Night Angel

Hey guys, I just got started using Jin a couple of days ago. I'm normally a Ragna main but I'm aiming to get Jin's unlimited form in score attack. I kind of went headfirst but it seemed fairly easy to pick up. The main problem I have I found when fighting unlimited hakumen. The combos I use seem to be easily countered by his instant guard attacks, which he immediately follows up after and knocks off half, a third, or the rest of my health. In any case I need some tips on making combos that don't have any opportunities for the opponent to break out off. I tend to use the B and C Ice Cars during my combos and I tend to use them to get close at some points. The combo strings I can remember using fairly often are: 5C>2D>d.c.?>6C>d.c.>5C>j.B.>j.C>j.B.>j.C. (I usually can't hit anything after that.) (There's usually a random bunch of stuff I do before this combo to try and break the opponent's guard) 3C>214B On Unlimited Hakumen I sometimes follow up with some string of 5A, 2A, 2B, and end it with a 623A.