^True
Anyway's, Jiren and Toppo curb here, individually.
I'm not as familiar with classic Ion, but assuming this is the Ion Kyle that Sinestro forced to become the host of Parallax, or even the Sodom Yat Ion that fought Superboy Prime- he doesn't stand a chance against Jiren or Toppo.
And the assertion that Jiren can resist or remain unaffected by time manipulation is not a no-limits fallacy. Assuming that someone could affect him with their time manipulation, despite being nowhere near him in terms of power, is a no-limits fallacy. Jiren can overpower hax by people much weaker than him, as can every DBS character. That's one of their more unique abilities.