So, i've just picked this game yesterday, and wanted to be over with hard Asia Arcade and Legendary Souls trophies asap. I haven't played SoulCalibur since the old times of Soul Edge - well, i had a brief adventure with SC IV, but nothing long or serious - so i'm pretty much a complete newbie. I'm also a long-time Tekken player, and i have my Tekken habits like blocking by moving away; needless to say, most of them are pretty painful and i'm slowly getting rid of them.
So i know pretty much no characters, no moves and i'm only getting accustomed to the game's mechanics. Still, getting War Veteran, Skills for Duels (and beating the whole trail) and Pursuit of Obssession was insanely easy.
With Natsu. I just kept spamming A, A, B (without any directions), keeping block up only if the last hit of the five doesn't land - if it does, just repeat A, A, B.
Sure, i had to rematch a few times, but once-twice per a really hard opponent was the most. I've beaten Harada Tekken the same way, and it was ridiculously easy once i started to pay more attention to his uppercuts - those juggles hurt too much to ignore them.
I also managed to beat several A ranked opponents using the same 'technique'. I had a 2:2 situation against Alissa once (out of three tries against her). Throwing in
B from time to time helps against the most demanding.