EWGF is "Electric Wind God Fist." It's the signature Mishima uppercut (forward, neutral, down, down/forward +2), and staple in their offense because it starts a combo on hit and is advantaged on block.This sounds really interesting, but I have absolutely no idea what your acronyms mean. Would you be willing to explain what they are and what the moves you're talking about do?
The primary caveat is the demanding execution; down/forward+2 ("2" being "right hand" in Tekken parlance) must be simultaneous to be an "Electric." The ordinary WGF is a pretty terrible move, so mastering Electric is a key part of Minima play.
OTGF is "Omen Thunder God Fist," which only Heihachi uses (forward, neutral, down/forward +1, basically a shoryuken). It's safer than its ordinary version, hits harder, and starts a combo on hit, but it's really slow and is equally demanding in execution. The slow speed can be circumvented due to its evasive ducking property, but it's a niche move and rarely ever used.