While EF is mathematically superior to Selfless Healer, TuanHA's CR does a good job of getting great healing out of a subpar spec. In my experience, EF benefits from clever placement on raid members, and you can't expect an automated rotation to get it on the "right" people 100% of the time.
SH works well with TuanHA's CR for a few reasons:
- Simplification: One of the biggest dings against SH is that it requires you to basically be judging the target on CD, which imparts unnecessary overhead on the healer. The CR handles this automatically.
- Reaction Time: CR's have a huge advantage in terms of reaction time. I've found that this CR takes advantage of the fast/instant (and cheap!) Flash Heals from SH moreso than intelligent usage of EF/SS. Your mileage may vary, of course, but being able to "snipe" tank heals by slamming a huge, instant flash heal into the tank is arguably more useful than the constant stream of tiny healing ticks from EF, even if those little ticks of healing look good on the meters.
- Mana Efficiency: This is probably a consequence of gear, but the mana efficiency of SH is great, because it allows you to use Holy Radiance; EF/SS usually ignores it completely due to the mana cost and inefficiencies. It's still not a great spell...but it's not awful if you're coupling it with IoL procs in certain situations.
- Light of Dawn: Spamming LoD is nice (meter-wise) in raid damage-heavy encounters (which is basically everything in BRF, from what I've seen).
- Mobility: It's a very specific case, but you finally have something other than Holy Shock to do while you're on the move (judge a target), and occasionally the planets align and you'll have 3 stacks of SH to hit somebody with an instant crit Flash Heal when they need it.
The disadvantages are well-documented: you're wasting globals on Judgment, hasted Flash Heals will always bump up against the GCD, etc. However, I feel that it capitalizes on the benefits offered by automated combat rotations better than EF/SS. I've managed decently high rankings on a few BRF Heroics with TuanHA in conjunction with SH. You bring something different to the raid than most Holy Paladins, and
can be an outstanding tank healer. While I'm not arguing that SH is great, it is viable, and TuanHA's CR gets a lot of mileage out of this spec.
That said, once I start on Mythic BRF, maybe I'll realize that I'm completely wrong. For now, however, it's interesting and works out pretty well. I'd love an option for "Holy Radiance only on IoL procs", but I think TuanHA has his hands full right now.