Praxic blade with impact core or and good sword. A good heavy machine gun for cere lightning fingers . Arc resist on chest for cere. Void I run contraverse hold works great. Solar song of flame for the scorch. You can also try armour charges with purge mods on your boots and orb generation. You'll want some sort of healing personally I suggest warlock void for devour and rifts. Or if you wanna be cheesy strong hold exotic on titan with praxic blade and banner of war. Most people seem to run Praxic blade or wolfs bane which both are good options.

For me….i prefer praxic blade for encounters 1&2, then finality auger + burst pulse rifle (either retrograde or aeterna…spelling?) for final boss.

The videos may seem old but almost nothing in the game has changed since that Dungeon has come out. Same artifact, rewards pass, and pretty much sandbox. Although Warlocks did lose the ability to instantly kill bosses.

The praxic blade helps but is not needed.