Can also look into a healing breath trigger set for when you're /RDM. Stone is instant cast and has a 1 second recast, casts 4MP. Amazing for healing breath now. With all this new HP gear, it's easy to get 2400-2500 HP (1200-1250 HP trigger). Remember if your Healing Breath trigger HP is 1200+, there are very few mobs in the game that can kill you from that high HP, so unless you're fighting multiple mobs or like Ig Alima or something, you're virtually unstoppable.
I use something like this, granted it could have more HP but remember, inventory constraints!
ItemSet 311909
Body augmented with +120 HP
Feet augmented with +40 HP
Legs augmented with +65 HP
Additionally, not only do the Gorney pieces provide good +HP but the +DEF/EVA/VIT helps you to take reduced damage while during the 2-3 seconds until your Wyvern actually hits you with the breath(sometimes I've died between HB activation and the HB actually hitting me, so the +DEF/EVA/VIT helps).