650b x 28mm tire / rim problems

[bicycletricycle]

I have a friend, she has a super small canyon road bike that came with 650b wheels, she runs 28mm tubeless tires on them.

She has had some flat tires and could not get the tire of to repair them.

She is running tubes now.

I want to help her.

Option 1. Get her on some better tires and sealant that will reduce the chances of her getting a flat in the future. She has some mavic wheels on the bike and I have no idea what the best 650b x 28mm tire would be for her. I think she has some kind of maxis things on their now.

Option 2. She is comfortable with taking tires on and off and changing tubes so maybe just building her some non tubeless 650b wheels with rims that are easy to get tires on and off of.

I prefer 2 because I do not like tubeless but the only rim I can think off is a Dyad which a little heavy for her and she also has a disc bike.

Can anyone think of a nice 650b disc rim that is easy to get tubes tires on and off of?

or

What is the best all around reliable 650b x 28mm tubeless tire?