Rainbow,
Namaste...
I think there are many ways to clear, but what is most important is, like Reiki, being mindful and having the intention of clearing.
You named very good ways to clear. If they connect well with you, use them.
And also you are kind to be so considerate of the person's situation, not using burning sage. I think that is really important, too. (I have used sage, but not burned it already because of allergies or sensitivities. I just visualize it burning.)
I have also used various Reiki symbols to clear. I was taught this in Reiki 2, using distance symbol to send ahead of me and emotional and power symbols on all walls, ceiling and floor.
For personal clearing, I also love a good salt soak (prefer sea salt as opposed to epsom, but that's just me. :-)
Also connecting with Mother Earth in a physical way with ground, water, sand, plants, etc. takes the negative energy away. (Bless Her for taking it.)
But clearing, also involves my allowing what's negative to leave. I need to release it in whatever way feels right, and that is different again depending on the situation.
I'm sorry to be so vague, but I really try to pay attention to what is needed in the moment, more than have something specific.
But if you need something specific, then do that. It's really what I think you connect well with.
I hope this is helpful...?
Abundant blessings,
Mammabear