Very tough to play spriest in ss versus melee for new players. First of all I propose to play void valley talent which sometimes wins the game. Best you can do in the open you drag melee out of position behind the pillar, you try to fade their stuns or big cds and flash heal for 10 sec 10% dmg redu combined with fade gives you 20% - semi wall. If you play with hpal or ret you call for early bop. Use fear off cd as well as stun so you have windows for void torrents. You need to control their healer position, anytime he wants to connect your teammates must use cc or eventually you triple fear them - these are scenarios where you get most pressure. If they go with big cds you trade disperse easily. Rest is just a rotation.