Warrior/Knight Help Accessory Suggest For Water Tank Build!

After the update, The Legendary Island is released and there's new Diamond Accessories. So i want to wear them for my Knight Build. But I really don't know what Diamond Accessories should i wear for my Knight Build. Anyone can suggest me? Please!
Here's my current Knight Build. I want to be more Tanky. (I mean more Element Defense and Health Regen than current one.) Thanks for making this build @StoopidDog !!!

Spear : Idol

Helmet : Blue Mask
Chestplate : Chef Hamsey's Apron
Leggings : Vaward
Boots : Gaea-Hewn Boots (Hive Master Boots)

Current Accessories :

Ring 1 : Concentration
Ring 2 : Moon Pool Circlet (Hive Water Ring)
Bracelet : Scalding Band (Dernel Jungle Accessories)
Necklace : Gigabyte (This necklace was supposed to be a Royal Stormy Amulet, But i changed it.)

 

Prism
Prism
Prowess
Diamond fusion necklace

 

Thanks. I will think about that accessories.