Citrine? You need them for HP? With lower Def you
will lose that HP too fast.
In that case much better is to buy +15 Vit stones,
they give both Def and HP together. Imbue 24 of them
into 6 pieces of your armor (cape included).
God's Giving -> Enhance -> bottom row
Later, at lvl 150, for Dragon gear use +20 Vit stones.
You get them at Boutique Forge by converting Pure
God Stones.
Pure God Stones you get from chest at the end of FC,
if you take Daring Rescue quest, kill Styren and deliver
quest for Faithfulness, take quest for heads and deliver
after to Celestial Sister for Sincerity, and both deliver
after last boss Holeen to Frost Elder. He will give you
the said chest: 2 Pure God + 2 Recraft + 2 EC.
Or you buy Pure God Stones from other players.

If you use Lunar Cape, you will use +15 Vit stones
in it all the way, it can't accept +20 Vit stones.
~~~~~
As Tali already said, g14 is not refinement level,
it's gear grade. Max refinement for any grade gear
is +12, and for 100% success you need
Dragon Orb Flame, bought also at God's Giving.
Takes 12 of them per piece that you refine.
Add them to bottom square in refinement window.