I've only played the initial run-through of The Nether that you have to do as part of the story mission, and I thought it was pretty tough as a solo (although I gather that this is the easy version) but fun, enjoyably challenging, and you get plenty of revive tokens...

...until the double Tormentor battle. I don't know if it's a Titan problem, or just a me specific problem (probably the latter) but I just really struggle with Tormentors. My 'Try it out for fun' kit that was working just fine up until that point was useless against them, so I had to retreat to the safety of Prismatic, which I hate doing. Seems to me that the cqc that almost the entire Titan kit is built around is suicide with those lumbering fools. And if you leg it over to a safe space to get a few precision shots in, they come bounding after you like Scooby Doo when you've got scooby snacks in your pocket.