1. A Persistent Spell changes a Personal or Fixed Range spell's Duration to 24 hours. A persisted spell can then benefit from Extend Spell which will raise the spell's duration to 48 hours.
So say for example an Extended Persisted Divine Favor would normally take up an 8th level slot (1+6+1).
Under Share Spells for Familiars and Animal Companions it states something like the following:
"Additionally, the master may cast a spell with a target of "You" on his familiar (as a touch range spell) instead of on himself."
2. So, our character can cast their Extended Persisted Divine Favor as a touch spell on their familiar / animal companion.
There is also the reach spell feat which states: "You may cast a spell that normally has a range of touch at any distance up to 30 feet. The spell effectively becomes a ray"
3. Some might get tripped up on the word normally, but in context I think it just means that the spell is no longer a touch spell. We can now cast an Extended Persistent Divine Favor at a range of 30 feet for our familiar / animal companion.
Then we have chain spell which states:
Any spell that specifies a single target and has a range greater than touch can be chained so as to affect that primary target normally, then arc to a number of secondary targets equal to your caster level (maximum 20). Each arc affects one secondary target chosen by you, all of which must be within 30 feet of the primary target,
4. Divine Favor does have a single target, You, (or familiar/animal companion if you think it changes) and because of Reach Spell, the range is greater than touch. So, this spell should now be eligible for Chain Spell yes?
Additional Thoughts: I could be persuaded that even with the appropriate spell slots, a Chain Spell Reach Extended Persisted Divine Favor could not be prepared because you can't memorize A Reach Extended Persisted Divine Favor because Divine Favor is a Personal Range spell that only becomes touch the moment you use Share Spell on your familiar / animal companion.
However, You should be able to spontaneously use abilities or items that apply those feats in the moment. For example, one should be able to Apply Reach Spell and Chain Spell Spontaneousy through abilities or items. So for example, with our Extended Persisted Divine Favor that is turned into a touch spell could be instantly modified using Divine Metamagic: reach spell and a metamagic rod of Chain spell.
Main problems occur because of these texts:
Regardless, you may activate only one divine feat (or use the ability to turn orrebuke undead once) per round, though overlapping durations may allow you the benefits of more than one divine feat at a time (Complete Divine page 77)
A caster may only use one metamagic rod on any given spell, but it is permissible to combine a rod with metamagic feats possessed by the rod’s wielder. In this case, only the feats possessed by the wielder adjust the spell slot of the spell being cast
So we want to apply 4 metamagic feats to a spell, but we can only use Divine Feats for one of them and a Metamagic Rod for one of them which leaves 2 feats that need reduced and/or instant application that can't come from a divine feat or a metamagic Rod.
Things Like Anima Mage could do a little bit, but that's not ideal with Divine Metamagic obviously.
Any ideas or thoughts on this proposal?