Well Liu beat Shao Kahn who is unbelievably powerful more so than a thunder god, also he beat shinnok and shadow jago is just jago + omen (both have a bad win streak)
Hanzo has stated he still has scorpions power (aside from the undead bit) so he still has hell-fire abilities as well as things like a teleport and a spear, and if it was scorpion he gets stronger in the never-realm (even though he would not need it)
No he has been defeated many times…
By T.J Combo, Hisako, Maya, Aganos, Kan-Ra
The only undefeated characters are Hisako and Fulgore Mk3 (Eagle)
Like I said Scorpion is undead
Also Hanzo would not waste time by letting him get to that stage he is also a hot head also ‘hellfire vs normal fire’
Honestly Liu can do it by himself since he beat and Elder god Shinnok (in the original time line and they cannot be killed) and beat someone as tough as a god (Shao Kahn). Shadow Jago may be powerful but its just jago possessed by omen who gets beat by Kan-Ra and ARIA as well when he no longer needs jagos body since he is powerful enough not to need it