magnate said
"I disagree with Pickles"
No you don't
.
Building lots of temples is irrelevant in SP as the AI does not defend his or preach much. So your dominion will spread for free - especially if set at 9+. And its benefits are the same in SP - at least offensively - the AI will never try to squeeze you or spam immortals etc.
I am not sure why your summoned commanders get more HP in dominion either are you sure? (hot things like hot better etc but more HP?)
Pickles