I'm new to Nicehash and found pratikt's post while searching a similar question which I think is a better question to ask since a certain coin/algorithm can be profitable today but tomorrow becomes unprofitable. If your mining pool does not support the coins/algorithms that are now profitable you will need to look for new mining pools that do support them.

My question was "which pay schedule is best for standard orders?"
Judging by pratikt's post I assume they believe PPS is the best. I don't have any data showing this but I think a Prop payout system would also be profitable for Standard Nicehash orders. I'm curious as to what pratikt think's about this and I was hoping he had a post discussing mining pools.

If you are doing a Fixed Order is the only time a PPLNS would make sense.
Using PPLNS on a Standard order you would need to keep your hashrate limit in the low-medium range to ensure another miner doesn't outbid you and reduce your hashing power, and you would need to keep your rate in the middle to ensure your order doesn't die and runs for longer.

The last tip I have is to use a Merged Mining pool(to mine multiple coins at once) or a Multi-Mining Pool(to switch between coins in the same algorithm) to keep your profits higher.