This thread is to brainstorm synergestic powers/items/feats... for radiant teams or lightsaber teams because everybody is either wielding a radiant weapon or focused on doing radiant damage.
Team Jedi
Administration of Radiant Vulnerability
-Morninglord PP
Requires worshiping amunator
16th level ability: hit a foe with a radiant power, foe gains vulnerable 10 radiant. Note that this applies before damage is dealt thus applies to the damage roll.
Pure glow (11 enc power) burst 5, Int/Wis/Cha vs will; radiant damage and they take 10 radiant when their turn comes up. Easily does 50 damage for double dipping on radiant
-Power of the Sun
Hit with {Lance of faith(cleric), Radiant vengeance(Avenger), Sun Strike(Invoker), Virtuous Strike(Paladin)} and administer vulnerable 3/5/8 radiant
-Solar enemy
Channel divinity power. (minor) Targets all enemies in a close burst 2. Administers/increases radiant vulnerability by 5.
-Brightleaf(125 gp reagent, cheap enough to spam for every attack) use a radiant power of up to 5th level and administer vulnerable 5 radiant. Comes in a paragon(10 vuln.) version at 3400 gp / use but that extra 5 damage/hit might be worth it.
Pick an at-will and if 125 gp is pocket change spam this to kingdom come.
Ruinous Resistance(warlock 16 utility daily) give vulnerability 5 radiant and fire for whole encounter
Jedi's tools
Punishing Radiance (epic feat, any divine class): Score a crit with radiatn and all foes within 5 gain/increase vulnerability 10.
Radiant Advantage(epic feat, cleric): deal radiant damage = you and allies gain CA till end of your next turn.
Font of Radiance(epic feat): score a crit with radiant foe glows(save ends). While glowing any enemy that starts their turn in affected square (critted foe and all adjacent) take 3d6 radiant damage. Areas do not stack.
Student of Ciaphon (Starlock PP) crit with radiant/fear on 18-20.
Action Point: power gives ongoing 5 radiant(save ends)
Radiant servant(cleric PP) crit with radiant on 19-20.
Action point: ongoing = level radiant damage(save ends)
Solar Wrath(enc burst 8 vs will) radiant. Must use 18 level Brightleaf (3400 gp) to administer radiant vulnerability)
Demons and undead beware
Boon: Pelor's Sun Blessing(level 3) add con/wis to damage to those vulnerable to radiant
Gifts from Pelor (what you give to other team members that don't want to convert)
Radiant weapon (level 15, any weapon) adds enhancement to damage. Does radiant damage and makes the power a radiant power.
Bless Weapon(Paladin utility 2 daily): gives weapon +1 attack, +1d6 radiant damage, if foe attacked by blessed weapon user can crit on 18-20.
Armor of Burning Wrath(invoker) makes armor of wrath deal radiant damage
Radiant Breath (dragonborn feat) make your breath radiant. It also gives your breath the radiant keyword. Rod of the dragonborn, while it doesn't add on the keywords, does make the damage type radiant which might be enough
Radiant Power (deva implement user feat) -2 to hit, attack deal 2/4/6 radiant damage. Does not confer the keyword.
Hero of faith (MC avenger, req: 15 wis): if you meet the requirements and are melee this feat is pure gold and a great opener to the following 2 things
Pervasive Light (divine feat) hit with non-radiant power you deal extra damage equal to the vulnerability. Best way to get this is MC divine (did I hear hero of faith) and then take this feat.
Symbol of Divine light (level 15 Holy Symbol) Property: any enemy with vulnerability to radiant within 5 has that vulnerability increased by 5. Simply have everyone take a MC [divine] and wear one of these. The damage will go through the roof.
Radiant Hunter (ranger MC [divine] Paragon feat): your Hunter's quarry damage deal radiant damage. This is a lesser feat than pervasive light.
Misc
Nimbus of Light(feat), hit with encounter/daily radiant power you create a burst 1 giving all allies +1 power bonus with radiant powers. Sadly it's typed so we can't do better than having 1-2 maxing out this feat for the team.
Astral Fire(feat) implement users version of weapon focus but for radiant and fire powers
Glowstone(consumable cheap thing) standard action to ignite, affects only undead but triggers their radiant vulnerability when they start within 2 of where you threw the stone.
Stone of X (level 12 wondrous item) If you can get 5 members in your party to each have 1 of these you all get this following wonderful vacation package: +2 init, +1 item bonus to saving throws.
Radiant Team candidates
Divine feycharger(striker | defender): I'd like to swap out TWF/TWO for Weakening challenge and forceful challenge to better fulfill the defender roll. Took arcane mutterings to become the party face using his pimped arcane bonus towards diplomacy/bluff/intimidate.
Cleric / morninglord(healer controler ): Focused on bursts and healing
[Controler] What do you have in mind?
[Striker] Can you do better than the feycharger?
Math to show superiority of radiant teams
I know that this trick works for any vulnerability administration, but radiant is the easiest to get.
Let's take a look at a PC with a radiant weapon with n members in the team each wearing a symbol of divine light. Assume ranger hit using a brightleaf reagent thus administering radiant 5 vulnerability the last round.
n=1 | +10 damage (5 vulnerability + 5*1 symbol) | 10/1 = +10/team member
n=2 | +30 damage (2(5 vulnerability + 5*2 symbol)) | 30/2 = +15/team member
n=3 | +60 damage (3(5 vulnerability + 5*3 symbol)) | 60/3 = +20/team member
n=4 | +100 damage (4(5 vulnerability + 5*4 symbol)) | 100/4 = +25/team member
...
We can see that as we increase the number of team members the total increase in damage for each team member goes up.
Please contribute to this thread by brainstorming items/feats.... that synergize well with a radiant team.