Now, what to do in the event that she doesn't get a mandatory Plane Shift? In that case she'll assume that being on this planet is not causing the Inheritor more than one spell-prep-nudge of inconvenience and proceed to doing the most she can for the cause of Good on whatever planet best enables that. Which might well be this one. This one is only humans, apparently, so who knows which planet has more people, but they're both under existential threat and need something unexpected to stabilize themselves against those threats.
If she can start one or more Good churches she should almost certainly stay, but even if she can't, there are other people on Golarion who can do what she does and here she's much harder to replace. By the same token, someone like Sanguine who can do only a couple things, but can but do them all day without limits, would be a bigger deal on Golarion than he seems to be here.
That suggests that what she should be doing is trying to get reliable back-and-forth travel between Earth and Golarion, possibly using the locals' existing knowledge of interacting with what they call "other Earths". But that, even more than starting churches, is something to be approached carefully and in cooperation with the governments here. Both worlds have resources to trade, but they also have dangers, and people whose minds bend more to conquest than cooperation. Something to think about.
The one case where it seems most important that she not stay here, given the option, is the case where everything she does will be matched by the Evil gods and Earth will end up worse off, or no better off, than before. How likely is that? More likely than she'd like, but still not very, she thinks. It's always possible that the Evil gods will spend vastly more on this planet than the Good ones, but they could do that with or without Samora being here, and anything spent on this planet can't be spent elsewhere, so the question is, assuming a balance of investment, who wins? If the Inheritor sent her here, She thinks it's a good idea for Samora to be here so it can be assumed to be one. If the Inheritor didn't send Samora here but now she can operate here freely, that's an asymmetric advantage worth using. And more broadly, this question isn't a bet on her own skill. It's a bet on the people of Earth, on whether they stand to gain more from working with the Good gods than they stand to lose from being manipulated by the Evil ones, and from what she's seen she's inclined to take that bet. These are a people who send their strongest warriors across the world to help a city in need, people who invented the Endbringer truce and held it for years without a single Lawful priest. She knows she's mostly seen them at their best; she thinks their best is good enough.
Her boots recovered their spent charges hours ago; the sky is beginning to lighten. She stops pacing her room and kneels, sword in her hands.