Good morning, Nick. First, they're not my stats, they're the Huskies' stats, as posted on the team website.
Second, I appreciate you're aware and acknowledge the potential failings of relying wholly on +/- numbers. As I've said, so was I, until the numbers became so convincing over a significant period of time. For sure, in any one game or situation, a player's +/- can be affected by who else is on the court, whether it's at the start of a game or during what some would call 'garbage time.'
However, Nika's +/- numbers were often so much lower than her teammates' that your point couldn't possibly explain the discrepancy. No matter how one leverages one's point, the fact is that the team is more successful with others on the court. I would love to see the team flourish with Nika on the court... I'm as much as fan of her as a person and for what she actually brings to the team as anyone.