You keep saying you aren't experienced with Favored Souls, I've been playing them since the class came out and basically wrote the book on the class. I know what I am doing when it comes to Favored Soul builds.
I don't take flame of the favored because its not a great ability, in DDO, we are constantly moving around and a healing ability that you can only place once every 30 seconds is pretty bad. Its mildly useful during
some raid boss fights and that's about it.
Empower Healing isn't a great feat, you can only reduce the cost of it through the Beacon of Magic tree and not through places like destinies. Mass Cures and Cures in general are the spells that get used a lot. Heal spell is used on mostly whoever is the one taking the most damage. I can cast a cure with maximize and intensify for no additional SP cost which makes them harder hitting than Heal and for less mana and oftentimes AoE.
The Quality/Insightful spellpower is a loss I take to have better DC's and survivability. But I over-heal nearly everyone, its more about the crit chance and multi than the spellpower, especially when I am already around 1000 spellpower. I know I lose 6% spell crit but the benefits outweigh that loss.
Not taking enlarge is not a huge issue. Favored Soul gets Leap of Faith which allows me to have fantastic movement around any quest/raid and be close enough to heal and raise a person. It's never been an issue for me. Been healing raids for years without it.
Flamecleansed is a decent set but the items that are in the set aren't great, with more modern gear you can create much better gear sets using various other set bonuses and augment sets.
You also seem to be not reading my gear because if you were, you would know I have 25% artifact universal spellpower and 15% helpless damage to targets in my gear set already. I am only missing the 30 artifact spellpower and 6% crit chance from flamecleansed. Everything else in that set is covered in a better way that again allows me to have better DC's and better defenses
Lastly, 2 points of constitution is not a make or break on my defenses, it is at most 45HP (after % scalings) and would require me giving up other things in my gearset that are more important. I have a globe slotted in my cloak (again, you didn't read my gear well enough).
Since you insist on a breakdown, fine:
Evocation DC:
19 Base
53 Charisma (72)
6 Enhancement Bonus (78)
3 Insightful Bonus (81)
2 Quality Bonus (83)
2 Profane Bonus (85)
2 Sacred Bonus (87)
3 Artifact Bonus (90)
2 Eyes of the Beholder (92)
2 Otto's Irrevocable Power (94)
2 Greater Evocation Augment (96)
4 Destiny Cores (100)
3 Epic Destiny Tier 3 (103)
3 Epic Destiny Tier 5 (106)
1 Wizard Past Life (107)
1 Guild Ship (108)
2 Reaper Ring Boosts (110)
3 Sorcerer Past Lives (113)
2 Embolden Spell (115)
1 Vengeful Magic (116) (Angel of Vengeance Core 5)
2 Ascendency Shine Bright (118) (Angel of Vengeance Core 6)
1 Evocation Focus (119) (Angel of Vengeance Tier 5)
4 Scion of Celestial Plane (123)
4 In Reaper Bonus (127)
--------------------
Evocation DC 127 (129 in aura of menace)
Ultimately, I didn't post this build for feedback and changes. I posted it to help the people who have been following my favored soul builds for years. It may not be made the way you want it and that's fine, make your own. Some people in the thread caught some mistakes I made when typing up the document and I fixed it (if you did that, thanks

). This build is what I use to run daily R10's with my guild, its what I use to raid and it's what I use to solo high reaper content. Soloing R10 does not have to be everyone's goals once they have all the pastlives. Soloing R10 is frankly boring to me, I can do it with no issues as long as I play right, its boring, I would much rather run with friends shortman or with full guild groups. No nuker will ever be doing as much as a DPS toon will do in R10's. Mobs are so weak right now you can kill them with basically any build, optimized or not, as long as you know how to move and play your character.