Duriel has better rewards. It takes ages longer to even get to maplh. Theyre the same level but all.the gear isnt even 925 from malph. And not even a unique drops every time. I thought there would be some awesome reason to collect those mats and run them but there isnt.
For the Uber stones, if you care about your PET.
But mats from Blizzard “endorsed” trade website as a lot players who no longer play S3 will dispose those mats with reasonable in game currency.
The PET is good in boss fight only as in other content it cant keep up with your movement speed.