I like how the Defense subdomain (of the Protection domain) looks when applied to the War domain, shifting the focus so it’s a little less aggressive. I think this might be the start of a hybrid domain that would be suitable for more defensive combatants and guardians.
This article originally showed the work, but 3,000 words is a lot of reading, so I moved it to another post.
Guardian Domain (Hybrid)
Associated Domains: Protection, War
Granted Powers: You receive a +1 resistance bonus on saving throws. This bonus increases by 1 for every 5 levels you possess.
Deflection Aura (Su): Once each day, you can emit a 20-foot aura for a number of rounds equal to your cleric level. Allies within the aura gain a +2 deflection bonus to AC and combat maneuver defense.
Aura of Protection (Su): At 8th level, you can emit a 30-foot aura of protection for a number of rounds per day equal to your cleric level. You and your allies within this aura gain a +1 deflection bonus to AC and resistance 5 against all elements (acid, cold, electricity, fire, and sonic). The deflection bonus increases by +1 for every four cleric levels you possess beyond 8th. At 14th level, the resistance against all elements increases to 10. These rounds do not need to be consecutive.
Domain Spells: 1st—compel hostility, 2nd—shield other, 3rd—nap stack, 4th—sudden aegis, 5th—mage’s faithful hound, 6th—blade barrier, 7th—refuge (favoring modified version), 8th—read intentions, 9th—prismatic sphere