7.4 kang, does torch have to have pre fight to be effective against kang?

Basically im just about to take on 7.4.6 and ive seen loads of people solo it with pre fight torch, and obviously they are very high caliber players, so if i used my pre fight and blew my chances at soloing cause im not the best at the game, would torch no longer be optimal? sorry if this sounds confusing i don't know any other way to explain
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I’m not a hundred percent on this because I still don’t have a 5/6 torch
I think Kang is vulnerable to debuffs during his second and fourth phase but I could be wrong. I just remember that he alternates between being taking more damage per buff on the attacker and per debuff on himself.