whatever you're used to works fine. it's not like you're doing brain surgery here, retouching a bunch of photos basically.
and stuff like white balance, bloom, you can even do in daz. also the default windows photos app you open images with can do a surprising amount, like easily filter your images with a whole bunch of retro filters (although there's a problem with those damn forced windows updates, as they've changed the filters without asking so you might have consistency issues coming back later and changing one render).
davinci resolve is an industry grade color grading software, but I've found it to be vast overkill for things you can really do in daz tone mapping settings. I find there's no visible difference after either way. (of course if you want to do something unnecessarily fancy like impose the noobish gold & teal look you must go outside of daz.)
I haven't used krita for other than painting, but yeah sure why not. I don't know what it is with gimp but I can never really get used to it, so I mostly use the old free cs2 photoshop.