Here is (almost) my Healing set:
The only difference between this set and my set is: I use Pythia Sash +1 (because I crafted it myself and was my first synergy HQ so I cant let it go for 1 MND lol) and also my right earring is Celestial Earring not Neptunes Pearl so that's also a 1 MND difference.
You can use Aqua Sachet too, its free.
This set gives you 51% Cure potency, so right on the Cure Potency cap of 50%. Also this gives you an additional 76 MND.
I use to be a Medicine Ring WHM. I broke the habit when I got a hold of a Facio Bliaut with 14% Cure Potency and Refresh. I must say I love having 2k hp now instead of being in yellow all the time. The hard part was getting enough MND to make sure that I didn't loose out on anything (I'm a freak about numbers). So here was my Medicine Ring build:
This set has exactly 50% Cure Potency with also the additional 76 MND. Again the changes I made to this set was stated in the above description. The difference between these sets is that with Medicine Ring set you have to lower your HP about 500 HP to activate the ring, and the Medicine Ring set offers a slightly higher -enmity. But with the Medicine Ring active the two sets are identical in math. They will both cure for exactly the same amount.
I would offer up an -enmity build but honestly, I never used one. I almost never take hate even when I cure spam. You will have to substitute in -enmity if who ever is holding hate doesn't do as well. But the first set has -15 Enmity and the medicine ring set has -18 Enmity, just fyi.
Some Unmentioned Notable Equipment Options
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Augur Gloves: These are a sweet piece: 7 MND, 5 Healing Magic Skill, and +4% Cure Potency along with some unrelated stats. These were an optimum choice when Surya's staff was only +1, but with the upgrade the staff has even more cure potency so this does not shine as much now. If you take out the cure potency these do not match up with Healer's Mitts +1 at all (MND+7, Healing magic skill +15) vs (7 MND, 5 Healing Magic Skill). Yes it is a minor difference, only 8 Healing Magic Skill difference. But for the optimum build augur gloves do come short. If you don't care about that sort of thing then go with Augur Gloves because it also has Enhancing Magic Skill +5 which will increase your Bar-Spell Resistance by 1 point, and also saves you from having to carry around both so you'll have 1 more inventory spot :P
Bibiki Seashell: This use to be the best cure ammo piece. Before there wasn't any +2 MND ammo pieces around, only +1. This offers +4 VIT and the Cure Formula states that Cure Potency > MND > VIT > Healing Magic Skill. So 4 VIT was greater than 1 MND mathematically and showed in game. If you cant get a hold of an Aqua Sachet or Quartz Tathlum then your best bet would be to go with this sweet ammo piece.
Sirona's Ring / Karka Ring: This ring has some crazy stats going on and might look superior to everything: VIT+3 MND+3 Healing magic skill +10. If you studied the Cure formula then you would know that Cure Potency > MND > VIT > Healing Magic Skill. Looks like a lot right? Well mathematically this ring equals exactly 6 MND (to the decimal) if you do the math (I did). Even though it comes short of Aquasoul Ring it is very powerful for the cheap price it goes for. There is also Karka Ring and that gives you 6 MND as well as Magic Accuracy. This is good for Repose as well as Banish and Enfeebles. If you also have RDM then Karka Ring might be something you'll look more into than Aquasoul since it does not offer magic accuracy.
Aristocrat's Coat / Noble's Tunic : These bodies were the crown rulers of WHM bodies for 7 years straight. This offers 12% Cure Potency with Refresh (10% for Noble's Tunic). This body is far from dead as there are so many cure potency combination builds available you can still utilize this to its full potential. Back in the day I bought my
Noble's Tunic for 14,360,000 Gil... and later sold it for 300,000 Gil and bought my Aristocrat's Coat for 3,000,000 Gil. The value of Gil sure has changed over the years lol. Bottom Line: This is still one of the best bodies you could use for Healing. I just was tired of using it and decided to branch out to other options and created some more advanced sets. Some pointless information: I once augmented a Noble's Tunic and got 3 MND back. I'm not sure how high you can get on MND but if you could manage to get like 5 MND on an Aristocrat's Coat then I would probably use that over anything just because that's bad ***. You could use that in the first set I posted and be 1 Cure Potency short which would in the math be less as even 1% Cure Potency equals a lot of numbers. I'm sure there is a combination that would get you close to the MND with capped cure potency I just don't see that exceeding it.
Orison Cape: I do not list Orison Cape because I find that it ends up lowering the maximum amount of MND you can equip. It is a wonderful piece of equipment: "Cure" potency +3% Enmity-4. It just doesn't work with me (I even own it). I have tried to find a great way to use this cape but it really only worked with Surya's Staff +1. If they upgrade Surya's Staff +2 even more then there might be a possibility of using this piece... but right now I just don't see that happening unless they increase the Cure Potency cap.
Orison Earring: This earring really doesn't have bad stats: "Cure" potency +2% Enmity-4. The problem is that there are heavy heavy Cure Potency pieces now and with the Cure Potency cap this piece just doesn't hold up. If you can't get a hold of a Roundel Earring then you can use this and Orison Cape together to make up for it, but you will have less MND (more -enmity though if you care about that sort of thing).
Orison Bliaud +2: This body, at first glance, was a slap in the face to us. We were waiting anxiously to find out the new stats on the body and hands for whm as the past 3 were crazy good. Of course after testing we would realize that this body has a trick up its sleeve. The
refresh granted on this body is 2 MP per tic. This also Enhances "Afflatus Solace" effect, which gives the person you cast on literally 400 additional max HP by giving them a stoneskin worth 400 HP. To make up for not having Cure Potency they laughably added in 20 Healing Magic Skill which is like... 6 more HP cured with Cure VI, not much lol.... The big thing for this body is for the set it lets Bar Elemental spells occasionally nullify damage of the same element and is increased with every +2 piece you have on when you cast. Wiki also states that "Adds Magic Defense Bonus +10 to Barspells of the appropriate element." which sounds suspiciously similar to Blessed Briault. I'm not sure if that's true or not though...
Korin Obi and Twilight Cape: These two pieces are NOT dead. I list these here because you need need need need neeeeeeed to use both during lightsday and light weather. Korin Obi: Gain full benefit of Lightsday/light weather bonuses. Twilight Cape: Same elemental magic as weather/day: Enhances bonus. With both of these equiped your cure numbers will be crazy good. With the Obi your cures will proc 100% of the time when used during lightsday and/or light weather. With Twilight Cape your cures will receive an additional 5% bonus to that bonus. Your cures can get pretty sick when used together.
This isn't even the maximum you can get, I believe I was missing some gear during this screenshot.
There are some other pieces of gear that I cant find a reason to mention them. They were once the best of the best but over time they fell into the shadows, one piece would be Healer's Cap +1. This offered a substantial 7 MND with -1 Enmity but was replaced by Selenian Cap with a Cure Potency +3% MND+4 augment. That
UGLY hat held strong until more cure potency gear became available (one being Orison Cape) that could filter out that ugliness. Selenian Cap was finally dead with the release of the Orison line of gear where Orison Cap +1 was 7% Cure Potency MND+8 and Orison Cap +2 was 10% Cure Potency MND+10.