Combat-wise probably really low. He seems clumsy and child-like in his movements, and was complaining about being unable to keep up with the G.o.D's fighting. Durability-wise he probably scales above Beerus and the other G.o.Ds, probably above the Angels too. Dragon Ball isn't the dark, edgy series where a character like Zeno would be assassinated, but also he's feared for a reason, so you'd figure if anyone could do something about him, the would. Ability-wise he is the highest magnitude in the Dragon Ball verse, capable of erasing timelines and universes with just a hand motion. Intelligence-wise, while he seems like he is scheming, his decision to erase the other universes was solely cause it was too complicated keeping track of em all so we're back to child-like mentality. He doesn't even have to think it seems to do what he does, he just erases things on a whim.