I pretty much Main Heal on THM.. MP+ , Healing Mag. Potency and - Enmity are our best Materia Options.. with that in Mind.. you can make some beastly MP Builds.. now I see that you are only 43 but.... I use this gear at 50 for Main Heals.
My main wep Varies.. atm Ive just been using a Water Brand until I can a) Attach two +15 MND materia to it or b) a perfect Healers Hand Materia IV ( very rare )
Water Brand (w/ MND Materia or Healers Hand)
Raptorskin Targe (Lifethirst IV Materia Attached) +28 HP +16 MP
Electrum Circlet(Rubelite) w/ 2 Manathirst III's for a Total of +85MP on Head..
Felt Robe (Red) (Attached a Manathirst IV) +84 MP Total
Raptorskin Satchel Belt (Attached Manathirst IV ) +47 MP Total
Felt Gaskins (Brown) (Attached Manathirst IV) +56 MP Total
Mahogany Pattens (I decided to put 2 Hells' Fist III's for a total of +18 Magic Attack Potency)
(make sure they are uncoloured as the coloured pair are Doh only)( I'm at work but I am pretty sure you can attach MP to Feet here so you can easily do that also, and they come with a base stat of MP +10 also which helps)
Boarskin Ringband of W/E Ele ( Pre much only Materia of importance you could put on these would be Sagacious Might Materia) or Dated Toadskin Mitts ( They do give +27 MP but not able to Meld Materia to it so

)
Accessories = X3 MND +7 Rings or X3 +7 Piety Rings... or MP Wristbands
This is my basic healing set.. I need new boots for it lol.. but other then that its pre much done besides trying to attach 2 Materia into each piece of gear that needs it..
Also the Out of Sight Trait from Archer gives -10 Enmity, so Id look into getting that as well
