Phys DOT vs Luminary at Mirror Max Buget

While farming for a mb while charting, I also dropped a mirror so now I used up all my luck for POE and have a mirror and MB.

I already have a PRAW necro that can do most content and don't really want to invest in it further. I am looking for a zoomy all rounder build that can do 36/40 challenges and ubers/feared (not fast but comfy) and am between Rue's phys dot elementalist and luminary.

I am open to farming a little more for each build once online but assuming I really won't make a ton more, with a ceiling of mb and mirror which do you think would be best given my needs? Any help would be appreciated!