Luxor is PPS compared to Coinmine or Suprnova which are PROP/PPLNS therefore, to compare payouts you need to account for luck.
Luxor has a 3% fee but covers short term luck variance, pays for orphans, rejects and donates 10% of their fees to the project.
On top of that, they provide excellent customer support and UI.
Accounting for all of the above Luxor might be the cheapest pool to be in.
You should give Luxor a shot!
Cheers!