How would you rank the following minor league pitchers based on their long-term fantasy potential (keeper league) as starting pitchers?

• Nick Maronde (LAA) - competing for 5th spot in rotation?
  
• Alex Meyer (MIN) - frontline stuff?
  
• Tyler Thornburg (MIL) - destined for bullpen?
  
• Tony Cingrani (CIN) - led minors in ERA, 2nd in Ks
  
• Taylor Guerrieri (TB) - frontline stuff?
  
• Robert Stephenson (CIN) - frontline stuff?
  
• Wily Peralta (MIL) - likely to have rotation spot in April?
  
• Martin Perez (TEX) - performance doesn't match great stuff
  
• Matt Wisler (SD) - labeled as strong sleeper by Kevin Goldstein
  

Thanks for your help.