Just for reference.
What should a level 65, 70, 75, 80 and so on be clearing?
well as barbarian at lvl 73 I can max clear sigil 36.
however I dont see the point of it, it takes longer as you have to wait for cooldowns before a pull and have to clear everything takes too much time.
I do sigil 25-28 like a walk through, I literally skip all adds straight to objective takes almost half the time
That does fully depend on their gear.
A guy running around legendaries purely crafted from the dungeon aspects will punch way worse, than someone having gotten their BiS rolls at the same level.