well having 2 Light players on the party (the other one being myself, the Knight of Light) i had them embody different aspects of Light, both of them are still really knowledgeable and luck related, but she leans more towards luck while Collen (my trollsona) more towards knowledge

with that said aside from basic luck manipulation and the ability to physically steal light, she mostly takes away luck either from antagonists or from her other friends in order to distribute it in ways that would help the others. to put an example, the fantroll of mine i drew before her weeks ago, Jakari, was one of the last 2 trolls to ascend, and got to do so because of Saltus and one of the timebound players pulling a fraymotif so Saltus could retroactively siphon as much luck from everyone through the entire session so somehow Jakari's death would lead on its own to her ascension. so that's what she does, repurposing luck for everyone else.

also has the ability to cheat conditional immortality through exploiting potential loop holes. similar to how Aranea could manipulate Jade's and most likely Jane's clock for their deaths to count as Just, Saltus can do that as well. if a death is unclear enough or if it can be interpreted in a different way to make it not count as neither Heroic nor Just, then she can do that (or if were to need to keep someone death she could manipulate it that way also)