This was also mentioned briefly by me earlier in this thread and a few others, but during the events of Soul Edge, Siegfried manages to defeat Inferno without the use of Requiem or Soul Calibur. This should apply to both timelines, given the intro of SC6 shows Siegfried taking Soul Edge, presumably after defeating Inferno. Also, Xianghua and Kilik (both who scale to pretty much everyone) end up defeating Nightmare and later Inferno during the events of SC1. Granted, Xianghua had Soul Calibur when fighting the latter, but Kilik had no such equipment or boosts. At least, not in the original timeline, whereas in the new timeline he gains a power boost from Kali-Yuga potentially becoming another Soul Edge. Even then, new timeline Kilik when amped is still able to fight evenly with the Conduit, who himself scales to pretty much everyone. Hell, the Conduit is even capable of facing off against Inferno directly. And considering it never made much sense in the first place for Soul...