It's fun, right? Well there you go, as that is the purpose of a game.

Otherwise, I don't really see where you are going with this, why use Holy Freeze and Doom instead of Conviction and say, Grief?
Have you measured your IAS%? If not, use the calculator on indiablo.de

Otherwise, I tried something similar a long time ago, I think I used Conviction and Vengeance, IF I remember correctly, the +DMG on Grief is converted into elemental damage for Vengeance, but I may be wrong on this one. Anyway, that's an idea for you to look into.

And by the way, getting the fastest frame IAS on a zealer is must do.

edit: oh and forget the "little bit of PvP". PvP chars for PvP, PvM chars for PvM. If you confuse the two, you will suck at both.