As suggested, try using google or reading guides already posted on how to play Cleric.
But in that case I'll give it a shot. Some skills you need for PV are: Plume Shell, Ironheart Blessing, Stream of Rejuvenation (Don't use this until later because of slow casting), All buffs, Razor Feathers, Tempest.
Just pull mobs, use Plume Shell, stack a few Ironhearts, and then kite kite kite, spam aoes. How I did it. If you can, get Wings of Protection early (level 79 skill). As for PK, test it yourself. Via character points, play with it yourself, if you want I'd advice doing the typical 79 STR rest go into MAG just for 110 - 150 and then restat to how YOU want for PK.