Best action after finishing main story


What would be the best path to follow after finishing main story, pretty close to finishing it and would like to know if it’s needed to replay the whole lot at TVMH or there’s no need for it and should just crack up the mayhem? or a mix of both?

What about DLCs? Do they fall as well into TVMH or have a separate difficulty?

Apologies if it’s a bit confusing, trying to understand exactly what’s the best option but everything I found is 2019 dated.

Many thanks!

Once you finish the Story, use Mayhem mode and do side activities like side-missions, Proving Grounds, Circles of Slaughter you’ll reach max level pretty fast, or you can start playing a DLCs. TVHM is only for reseting the Story if you want play it again.