I think reversal is there for spammability...i might actually try that instead of divine boon as a spammable for more spams for the mana...i don't know if i'll be able to survive long enough though...
But i have a E/Mo solo smiter that actually uses water and earth defense spells...and thats all right now :|...most of my points are in earth and water mag yet i think half of my skills are smites :P (though i found frozen burst to be a nice damage spell when you're travelling in groups.)
My solo setup:
Zealots Fire
Divine boon (thinking of changing to RoF)
Balths Aura
Ether Renewal {E} (very nice spell for solo eles)
Armor of Earth
Armor of Mist
Aura of Restoration
Balths Spirit
Water Magic 11 + 3 + 1
Energy storage 8 + 2
Earth Magic 6 or 7 + 1 (don't have it in front of me atm

)
Smiting 9