Originally Posted by
wax_on_wax_off
I've got very specific ideas so feel free to take this with a grain of salt.
Firstly, at level 20, those build points that you invested in strength and dexterity will be completely wasted. If there is a significant benefit to the invested points while leveling up then I can understand but honestly I don't feel that there is. At 8 base strength you have some risk of encumbrance/enfeeblement so starting with 10 strength is ok but I tend to put up with a bit of hassle and go with 8 anyway.
What these free points gets you is a 14 base starting charisma (and 12 base starting intelligence). Your most powerful tool to level before you get blade barrier is Radiant Servant Burst. Your second most powerful tool is Turn Undead (before you get RS Burst). With 14 base charisma you can power your burst and have a high enough charisma that with a sacred item, the seek eternal rest spell and an eagles spell/potion you can annihilate undead quite effectively.
If you start with 12 base intelligence you can also take UMD which is an excellent skill even for a cleric. Being able to use scrolls like invisibility, blur, displacement, fireshield, dimension door and teleport is just amazing and I wouldn't forgo it for anything.
Feats:
Feats to have by level 6: Maximise, Empower Healing (to power Radiant Servant Burst, Empower is also good).
Feat to have by level 9: Heighten (Soundburst, Command and other CC spells start to lose their affectiveness and this is a good boost for them)
Feats to have by level 12: Empower, Maximise (for Blade Barrier, once you get this you win the game)
Working backwards this leaves you with 2 feat slots in the level 1-12 range into which you can put toughness (1) and Spell Penetration (12).
Then you can take Greater Spell Penetration (15) and Quicken (18).
Spell Penetration Feats are flexible if you don't want to pick them up you don't have to. Overall, they probably make you a more affective healer from the perspective that if you can prevent damage to your party by casting Greater Command, Slay Living or Destruction then you are a great healer (preemptive healing is awesome). (Greater) Spell Focus: Evocation could go here too for Blade Barrier and Implosion.
Quicken at 18 is for casting Mass Heal in raids. The feat can be taken earlier if you find yourself soloing a lot and want to be able to get off heals with less interruptions.