@T72on1 Question is do you want to maximise Lightning damage with CM but have considerable issues with life upkeep, or would you rather include some meaningful physical damage and play much more comfortably. I very much prefer the latter, meaning indeed using Grief. Most importantly though, despite slightly lower damage per hit on average, overall running was much faster. Because with higher elemental damage but survival issues, there’s plenty of time lost by having to back away or reposition due to the lack of ability to face tank during fights. Thats why I found Grief stronger overall.
@Luhkoh Grief Dreamer should use HLW and LoH, which means a 32+ IAS Grief PB will get you to 4 frame Zeal without need for Fanaticism. So it’s pretty easy to hit. I found high level Conviction was better than the physical damage increase from Fana, so Conviction is the aura I ended up using on the Paladin. Then Reaper adds not only juicy physical damage, but even more safety and leech. It also removes PIs and in many cases enables you to leech from those monsters, too. These are important further Reaper pros from my perspective.
I didn’t calculate Conviction vs Fanaticism + Infinity Merc numbers in detail as you did, and rather just compared gameplay. But as you said, generally LR is more prevalent than physical res, plus the life upkeep in general is better with Reaper... and that’s really the Achilles heel that’s being addressed with the physical/Grief approach in the first place (while losing out on as little DPS as possible, but apparently even here Reapers is at least on par with Fana). Also worth noting I used Enigma (not CoH/Forti) in case it makes a difference.
I did consider the Fanaticism route eg for farming specific targets and to hit certain FCR BPs (using different amulet/gloves than HLW/LoH). But the thing is charms are barely needed at all on a Dreamer, leaving you with plenty of inventory space.. so stuff like running Hoto/Spirit switch with CtA in inventory is definitely a viable approach to solve any FCR issues.
TLDR, unless specific purposes require otherwise, I would go Grief + Conviction with Reaper + Might Merc.
NB: I should add all of this is for high player settings, otherwise those survival issues don’t really exist ofc. I guess nobody plays such a char to run P1, but just to avoid confusion.