iron man is super good but it really long once you get to nex gear (without dono's)
your main grind is only half done you can still aim for other high end gear, mw and sang sov, full sirenic and hc xi.
also you can start the pet hunt or grind out the collection logs of different bosses, - i do that while i play an iron man.
hope this helps with your next steps, keep smashing it.