Originally Posted by
peng
There are fear immunity augments. Also, greater heroism gives fear immunity.
If you have access to them, completionist and past life wizard are better feats than greater/epic spell focus. Regular spell focus gives access to spell focus twists from magister and draconic. More spell pen feats or enlarge might be other useful feats.
Don't forget slay living and destruction for single target instakills.
Master of light gives +10 max caster levels to Sun Bolt, Searing Light, and Divine Punishment, not dc. And it doesn't do much for you. With the capstone, full zealous/intense faith and a divine destiny, you have 25 divine caster levels with +3 cl and mcl for fire/force/light/physical and +6 cl and +12 mcl for Nimbus of Light, Searing Light, Sun Bolt, Cometfall, Divine Punishment, Flame Strike, and Fire Storm. So without master of light, you cast Sun bolt at cl 34, mcl 30; searing light at cl 34, mcl 25; and divine punishment at cl 34, mcl 35. So it does nothing for dp, and not much for sun bolt. Searing light does get a boost, but it doesn't scale very well.