Of course, the salient question is not whether a coin is profitable to mine. It is how profitable. Scrypt mining profitability has crashed really hard in the last several months.

Right now the high bid on NiceHash for scrypt is .88 btc/gh/day which for a 250mhs machine is .22btc/day or ~ $123 / day
And remember, if you are renting through NiceHash you are unlikely to get 100% utilization. Also remember that everybody else
will be renting their big ASICS through NiceHash too so there will be a lot of price competition -> lower income.
In addition difficulty is going to go ballistic. Even now new coins often have many Ghs on them from launch.

Calculations of 13 day ROI for a Viper are not realistic. People are questioning whether the Titan will ROI. People are questioning whether the Vault Breaker will ROI. People are even asking the reasonable question: "Is mining by individuals now over ?"