I don't know the exact level requirements right now but here are some good cleric DPS/CC spells:
Blade barrier, harm, cometfall, flamestrike, searing light, bestow curse, order's wrath, holy smite, greater command, destruction....
Buffs you should have loaded include:
Divine power, divine might, deathward, nightshield, resist & protect, seek eternal rest (my cleric can destroy the giant skellies in the Tor)
Clerics rock out the DPS when they aren't healing the lesser classes....
Try hold person and a couple of puncturing weapons some time
The most helpful feat for soloing and endgame content is Quicken