3 quibbles with what's led you to your conclusion:
Originally Posted by Nascephor
My heal disparity going from 5b HoH to 5r/1b/1y MoW is waaay less than yours somehow.
Like, talking a 246 HoT on VS and 164-235 HoT on Sh-Inspire in MoW. 260 HoT on VS when I swap 4CotW/2Mene
318 HoT and 208-297 HoT on Sh-Inspire in HoH. 336 HoT on VS when I swap 4CotW/2Mene
Might be that I have higher OGH from a combination of things, making the additive bonuses from HoH mean less to me than to you. So the more you gear, the less relative heals HoH has over MoW.
Mind that your RC will on average be up more often when traited MoW than HoH, which can also affect how often VS is up with 4-HHealer. Incorporating availability of HoTs and not just comparing maximums is important. Swapping to CotW for VS kinda changes that around of course.
Remember that Shield bro is less on the fellowship, To Arms being only -5% incoming damage to your fellowship. Also, Shield-brother to-arms doesn't even work against inferno. Tested in lvl 20 BfE--real quick and easy, just have your herald hold Laugshat (give him melee troll so he can better hold against your heals) and whittle down Vadok and soon enough you'll get Inferno. I figured it wouldn't because Shield-bro To Arms, along with other forums of "-incoming damage" is actually source mitigation (melee/ranged/tactical, watch how popping To Arms ups those types of defenses in your character panel) and the inferno is seemingly considered source-less. Same with catapults. Type mitigation works for inferno though, and catapults presumably.
Even if 5% source mitigation from To Arms did affect inferno, you'd likely be better off with NfW+RO instead of NfW+Tact Prowess when Red, if that slot is to be used defensively (5s of 5% source mits vs better crit heals).
[url="http://platemetaljacket.blogspot.com/"]Plate Metal Jacket[/url]