I am sending you cards the usual way I send, without toploaders but in sleeves and team bags. I then put into a disk mailer.
Have a look when you receive. I find this the easiest and safest way to get cards around. Have done it this way for many many years now without incident.
I prefer this way as toploaders get messy, you have to cut tape and often cards are hard to get out.
I don't expect you to send the same way but just sharing some of my tricks I have picked up over the years.