Trying to figure out what the maximum possible spellpower that would be attainable for Light spells. Here's the breakdown I come up with:
Smiting IV - 80
Eardweller Click - 25 Psionic
Improved Brilliance Click - 15 Alchemical
eBlue Dragon Armor/Helm - 15 Artifact
eSoS with any spellpower crystal slotted - 30 Implement
Radiance 120 item - 120
Fey Visions +5
Sixth Sense +5
Fey Form III +15
Stand And Deliver +10
Radiant Power (Angel) + 30
Blood And Radiance (Angel) +30
Look about right?
The biggest obstacle I can see is finding Radiance +120 with both of your hands full. Theoretically, you could get it on a ring, but I've never actually seen that happen.
You could use Twilight with 120 Radiance, or EE Forgotten Light with a single handed CitW weapon that has been redslotted with spellpower. That option loses 6 points of Implement vs the eSoS, but gives the ability to conflux with 15 points of Psionic whenever the Eardweller is unavailable....and has the virtue of being likely to actually acquire.