As a paladin I would say holy has some nice sustained damage (untill mana runs out), only slightly bursty
(Like holy shock + (glyphed) denounce with 5x stacked Guardian, Divine favor, perhaps a "use" trinket or synapse along with an alchemy pop)
I think in pvp you would average at about 20k dps with pvp power gems on a resil opponent, uninterrupted casting ofc.
As of now, my holy is build on resil/hp with above 10.5k SP (65% resil, 201k hp unb), and my assistance burst is pretty good.
With holy avenger 30% more damage from holy shock, 50% from the glyph, and about 30%+ pvp power, you would get some insane numbers!