Here's my SF Prot build.
Blessed signet
Balthazar's Aura,
Watchful Spirit,
Balthazar's Spirit
Vital Blessing
Life Bond
Life Barrier
Rebirth
Sup runes on Smite and Prot, Smite - 14, Prot 14, Div 13. Use Wroth's rod and icon most usually or Yakslapper - Prot weps are cheap
Outside SF, I cast barrier, bond and balspriit on the tank, and life bond everyone else, and bal spirit on myself, that's 7 enchantments and bless sig at 13 will give me max 21 energy points back - just right - important bit is to stay out of golems who can rust you.
Once inside SF, the important bit is that the order of casting - barrier, bond, watchful, bal spirit, vital blessing. Note that Vital blessing takes shortest to recast so I apply it last on the tank, in case it gets stripped.
If I get life siphoned or deep wounded I put watchful on myself and if my health drops really fast, use vital blessing to bump it up. This can get to -5 degen in energy so will be out of fighting just to maintain these enchantments.
The bal aura is put there mostly for FA farming as a lot of times the ele + mm hasn't got enough firepower to kill Ivor. However, for other SF farming Bal aura is also very useful if you time it right with meteor showers.
Last, if I'm farming with friends I usually drop the bal aura and put life attunement there and adjust prot and div up accordingly.