XZC is hit on MPH now that everyone has jumped on board. That and the 20K+ difficulty has halved my daily take. Looking for other options .....
Nemo/ahashpool. Look no further. And mph is giving some people hard time mining xzc, while others seem to be doing just fine hashrate wise.
2) It was explained many times. Those who are doing fine with MPH are using correct miner.
What a bad response your "1)" is. Work for food? What does that even mean?
Anyways, use sniff/nemo, both are doing great on ahash.
In some countries it is usually called "to work for food", when the salary is so miserable that is not enough even for it.