Not sure how to use the multiquote feature so apologies for the messy post.
If there is a level requirement I haven't come across a guide stating what it is yet.
Influence as far as I know doesn't affect whether you can spar with her or not the first time, it obviously has an effect on being able to spar with her multiple times. This guide is old and before RCM's time but its been 100% accurate so far ni regards to what you can do at various points so unless this was patched or fixed in some way in this mod I'm inclined to believe that I should be able to spar with her once without gaining influence. I'm sure in my dark playthrough I never had positive influence with her.
The page you linked to is mostly stuff you'd assume you'd have to do to unlock sparring with her (and turning her into a Jedi etc), I guess I want to know what are the precise requirements for her to spar with you, if it requires my char or hers to level up fine, if I need to travel to another planet after Telos to unlock it fine, in that case the guide is wrong for the first time and I'll do that.