Not yet, but as it is one of my favorite PC for a cleric, I will take a shot at it...
I will only note the changes (so BAB and Save Progression remains the same)
Radiant Servant
Hit Die: D8 (as the BAB is medium)
Prerequisites
Alignment LG or NG (depends on deity; see below)
Base Save Bonus: Will +5
Skills: Heal 2 ranks, Knowledge (religion) 6 ranks
Feat: Extra Channel
Spells: Able to cast 1st level divine spells and access to the Sun domain
Special: You must have Iomedae or Sarenrae as patron deity
Class Skills: none
Class Features:
Radiance: When a RS casts a spell with the light descriptor, the spell is enhanced in power. This can have two possible effects, chosen when cast. The radius of the spell doubles, or the step between light and darkness shifts one additional step towards light. For example, a light spell cast in an area of darkness will grant normal light in a 40-ft area and dim light 40 ft outside that area, or bright light in a 20-ft area and normal light in a 20-ft area outside that area.
Extra Channel: The RS can channel positive energy 1 extra time each day at 1st level and every 3 levels thereafter, up to 4 times extra at level 10. (replaces extra greater turning at level 1)
Channel Positive Energy: RS levels stack with cleric level to calculate the amount of healing or damage of the Channel Positive Energy ability, and its saving throw. (replaces turn undead at level 1)
Divine Health: remains the same
Empowered Channeling: From 3rd level, 1/day, when a RS Channels positive energy, the amount of healing done or damage dealt is Empowered (x 1.5).(replaces empowered healing at 3rd level)
Aura of Warding: remains the same
Bonus Domain: A RS must choose the following domain as extra domain: Good or Glory (if deity is Iomedae), Good, Glory, or Healing (if deity is Sarenrae)
Maximize Channeling: From 6th level, 1/day, when a RS Channels positive energy, the amount of healing done or damage dealt is Maximized. This supersedes the Empowered Channeling ability. From 8th level, the RS can use this ability 2 times per day. (replaces maximized healing at 6th level)
Positive Energy Burst: From 8th level, the RS can use 2 Channel Positive Energy uses to simultaneously harm all undead in the area and heal living creatures in the area.
Supreme Channeling: At 10th level, when a RS Channels positive energy, the amount of healing is empowered and maximized. The RS can use this ability 2 times per day. This ability supersedes Maximize Channeling. (This replaces supreme healing at level 10)
Spells remain +1 CL per level...
This is my take on the Radiant Servant. It is clearly meant for Sarenrae, but I think Iomedae could have Radiant Servants as well, since she has both the glory and sun domains, which are key domains for this class. I put a x use per day on the empower, maximize, supreme channeling, because channeling is quite more powerful than ordinary domain healing spells. On the other side, healing spells use d8s and channeling d6s.
Calculation:
Level 6 cleric, level 10 RS with supreme channeling:
2/day: 12d6+16 (80 healing or damage - or both if using PEB)
Level 6 cleric, level 10 RS with supreme healing (using PF domain spells):
1/day: 1d6+1d3+5 (14 hp one target), 3d6+10 (28 hp one target), 4d6+15 (39 one target), 6d6+16 (52 one target), 1d6+1d3+16 (25 hp to 16 targets)
so sublime channeling is much better, so I put a x times per day. I first thought 3/day, but after above calculation, I changed it to 2/day.
A way of countering this rise in healing power is changing HD to d6 and BAB to weak (+1 every even level), or even making 1st and 6th level without spell progression...
