Jiren while EXTREMELY supressed at the start of the ToP was already stronger than all incarnations of Zamasu according to Shin. Later in the arc, Goku(without UI) became stupidly more powerful than when he first went Omen and overpowered Jiren for an instant. Then Vegeta caught up to Goku with SSBE and struggled against GoD Toppo.ankokudaishogun wrote: ↑Sun Jan 05, 2020 8:19 pmyou forget even Golden Freeza managed to survive Toppo's Hakai.
Now: while it's realistic Toppo didn't use his full power to avoid killing Freeza, Fused Zamas is still able to go toe-to-toe with Vegetto Blue.
He's MUCH stronger than Golden Freeza. He likely didn't need immortality to deal with Toppo... especially because IIRC he was fighting alongside Cumber and Hearts
So I don't think he's out of Toppo's ballpark.