There was another issue: at the time, he was one hundred percent sure that Fisher did not ignite Renie's mark on himself, but it was done by Helair to send him back to the present, and by coincidence, there was a deviation.
Fisher did not know the specific nature of Renie's mark. He also thought it could have been because he used it on the Tree Continent to deter Master Tao, which altered the power of the mark, sending him back four and a half years into the future.
But was it really such a coincidence?
He just happened to return four and a half years later, coincidentally when demons were rampant in the Nali Army, and coincidentally next to the factory where Nali produced Cardinals...
Even if Helair had Gui's backing, how could she have triggered the chaotic mark left by Renie, of a True God level?
Of course, there is also a possibility that Gui, to further understand the Doomsday Prophecy and find a way to solve it, may have already contacted the essence of chaos beforehand.
