best affiliate program for an online shop?

Hi guys

A friend of mine have an online shop and sell glasses.
Now he asked me if I could help him with an affiliate program.

He wanna create a self affiliate program like "Refersion", that everyone can create easy an account and make marketing for him (influencer, publishers etc.).
And he wanna publish his program also on different affiliate networks like "Awin".

Have someone a list with the best affiliate program solution and networks? Is Refersion the best one or do you know a better solution?
Do you know any good alternatives to Awin?

I do not want to test all of them, so I am grateful for your experiences - thank you

my experiences +5 years promoting all companies stealing your time and effort , they are showing you some cents in your account to let you work more after that even if you lead a million clicks they are hiding sales from you and stealing your revenue,
this is the truth