Originally Posted by
slarden
If you wanted to go fire/light fire domain is perfect. At heroic levels you have firewall + blade barrier which is an amazing combo. The problems with it is if your partner is melee it will be frustrating chasing enemies. Also, since you are 28 pt build without tomes you face a tougher road to get the DC needed and cleric casters are more dependent on dc than other classes.
Good intro casting classes are warlock because the base damage has no save - only the pact damage. Also wizard/sorc focused on magic missle/chain missle + other spells not subject to saves like niac's, polar ray, eldar's, ice storm, black dragon bolt. Consider those as other options for casting while you find tomes (+5s are free from favor once you have enough packs).
If you do want to go fire + light fire domain, firewall + blade barrier kiting is the most effecient way to kill mobs at heroic levels with divine punishment, searing light, sun beam, scorching ray, sun bolt for single targets. At epic levels energy burst + either divine crusader or exalted angel gives you a nice punch. Energy burst does good damage even with a wisdom main stat. Alternatively twist consecration + sacred ground into exalted angel without energy burst. Be sure to get heroic burscar sash and eventually legendary burnscar sash.
As a first lifer 28 pt build I would splash 3 paladin for the 20% hp boost + saves + PRR/MRR from a 13 ap sacred defender investment. You just don't lose much from doing that and the defensive gains are significant.