His durability is atleast solar systematic(Universal, since Loki said kill away, but even if you think thanos was holding back, think that a touch from a stick which contains the power stone can vaporize a planet), he took power stone to the head.
His best AP is going through the infinity stones' beams, which can be scaled around or a little above tier 5, destroying the reality stone with his lightning which was not even the biggest lightning, matching the necrosword's attacks in the shadow realm, which could kill all the gods in the Omnipotence city which housed the celestials too
He could shift Moon sized rings effortlessly which I don't think any superhero would have done in live-action
His speed is above light when he flew across a black hole(if you think it is not then understand this, malekith and the dark elves existed since the dawn of time and they can harness the dark matter/energy which possibly the reason for black holes
His best AP is going through the infinity stones' beams, which can be scaled around or a little above tier 5, destroying the reality stone with his lightning which was not even the biggest lightning, matching the necrosword's attacks in the shadow realm, which could kill all the gods in the Omnipotence city which housed the celestials too
He could shift Moon sized rings effortlessly which I don't think any superhero would have done in live-action
His speed is above light when he flew across a black hole(if you think it is not then understand this, malekith and the dark elves existed since the dawn of time and they can harness the dark matter/energy which possibly the reason for black holes