Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
One last thing--on those specific examples, can you say what specific requirements there are? "entry hazards" and "specially defensive jirachi" don't really give all info
Okay, done! However, I worded it to be "... such as special defensive jirachi AFTER sr and three layers of Spikes." because I thought it would flow better. Do you agree?
"Entry hazard support is recommended as it allows Raikou to secure KOs on Pokemon such as specially defensive Celebi after Stealth Rock and three layers of Spikes, as well as having the capability of sweeping more easily.