Does anyone here have tested thermals with the JSAUX backplate V2? Are they better than the previous one?

Hi everyone, when I started playing I was playing with my Necro and I kept finding this mf every single dungeon I entered. Then I leveled up and finally killed him making him run in circles while he tried to hit me. Then I started my second character as a Rogue and now I'm level 65 and I haven't met him a single time on the whole run.

I guess he either dead for good or scared of the DPS my rogue drops.

Has anyone experienced this?