Suppressor elite affix should not be permanent. Auto-skip, if not Auto-reset Tower or Pit run, on Skeleton Mage Necromancer.

It is logistically impossible to kill Suppressor Elites with Skeletal Mages in higher level Pit or Tower runs. I completely understand having some affixes being particularly troublesome for some builds; that adds to the challenge. But the Suppressor Elite affix may as well be the "Skeleton Mage Immunity" affix, and Diablo 4 got rid of Immunity affixes because they suck.

Get rid of it, or make it something you can remove with enough damage or a stun/CC effect. This used to be how they work, and they still sucked, but they weren't a complete immunity.