need some weapon advice +A divine weapon?

I'm lvl 58. 1st playthrhough, just killed the dragonSlayer and executioner. i have a+5 lightning Zweihander, a +3 quelaag Furysword

What would be a good divine weapon to add to my arsenal? or what should be a good weapon to upgrade into that path? ( I already killed Pinwheel)
Would it make sense to upgrade a shield ( my +5 grass cress shield or maybe greatshield of artorias+4 when i have enough str to wield it) into the divine path? according to wiki:

Divine ascension adds bonus Magic Damage and Divine Auxiliary Effects. It also increase Faith scaling and magic defense of the shields per upgrade level. However, it reduces Strength and/or Dexterity scaling

I have 11faith. 38 endurance, 28 str, 20 dex

Finally, my fury sword is a good fire weapon or eventually ill want a different one?
Also, im using a jagged ghost blade+3 for narrow halls ( are there better bleed weapons?)

Any advice is welcome. ( i enjoy playing with different types of weapons)