What do you mean " it might be useful to clear the labirynth at least once on any characters I use for the new content."?

You want to clear the lab on each version of it, to nab all them sweet ascendancy points. they are freaking powerful.


As for the "way" to clear it, having practice, skill and/or a powerful build is nice, but down to earth how I usually get it done is by brute force of being overleveled for said lab. (never finished the atlas lab though. I'm building char on the fly with no guides and most self-find items, so I'm not really all that powerful even at high levels.)