Talisman/Chime for healing

[MuffinWizard]

Without boring the populace with too many words, I'm trying to do a build for the Onyx Blade because it's so smexy. But I've got a LOT of catalyst questions. I'll explain a little so y'all can understand where I come from:

Since most of the Onyx Blade's damage/scaling comes from the dark damage, I was going to do base stats for str/dex (or close to it), then 40/40 int/fth.

And I figured, "Hey, I've got all this int and fth here, why not capitalize a bit for co-op purposes?" I was gonna put a little in attunement, pick up a few pyromancies, and also great heal.

So here's where things get muddy: I'm only going to 40 fth, and I'm only using healing miracles. I heard miracle catalysts get all sorts of screwy around this much faith. As i understand, healing is affected by spell buff, so the main question is which chime/talisman would have the most buff (at +10) here?

Also, if some catalysts give similar numbers around this point, do any have special weapon arts that would make them a better choice?

EDIT: on a new and moderately related note, I was considering the white hair talisman so I wouldn't have to switch between catalysts for spells. Is that a good idea? Or does the white hair talisman sacrifice power for utility, making a flame and a second catalyst a better idea?

[Washing Machine]

Canvas, priest's chime.
Most miracles are only affected by the Faith scaling and not the Faith+Int.

The way it works pretty much is that only dark attack miracles gain benefits from both scalings. So even if you'd look at the spellbuff and see that Sunless Talisman or Caitha's Chime is the highest with your 40/40intfaith, you still get better results using Priest's since it only takes the 40 faith and not the int. Same applies to lightning and such, also Dark Blade buff.

[Fire Guardian]

the white hair talisman could be the best idea if you only have around one heal and for my the pyroflame has 30 more spellbuff(not the once from dlc)

[MuffinWizard]

Alright, thanks for some of the input. While I have a few people, I have another question: I went out and looked for stuff on my own, and a lot of people were touting the sunlight talisman as some incredible item. Because of its weapon art, i think.

If I'm only doing healing, is that something I should look into?

[Washing Machine]

If you expect to be trying to heal while attacked, why not. Sunlight Tali has way more HA than the other talismans. Way less spellbuff tho.

[Serrassi Effect]

Yorshka chime for highest spellbuff and hugest healing but doesn't have poise cast.

Fillionore chime for increased area of effect for those area heals, also doesn't have poise cast.