User blog comment:Deshiba/Team Frost - an overhaul./@comment-128.230.200.87-20130212171426/@comment-4022742-20130212173724

For burst your combo would be:
 * Ult/Hawk (apply Chill)
 * Frost shot (consume Chill)
 * Volley (apply Chill)
 * AA while in range
 * Wait for Frost shot cooldown (cus it has a 2 second gap where there is no Chill)

Where as your sustained damage would be:
 * Volley
 * AA till Chill expires
 * Frost shot
 * AA till Chill expires
 * Repeat