I find FoL SP stacking is boring, though my numbers still hold pretty well.
We had a new paladin app, who was elemental shamang in Drama who went casual to play his Holy Paladin. Due to gear I was pulling ahead, but even as he geared up I held my own. Basically it balances, stronger single target more I pull ahead, more splash the more he pulls ahead as Haste/Int. So its a pretty even split in relation to gear.
Valithria you should be able to hit 22-26k hps without HL glyph.