Hi,
Just my own opinion :
Small cups are a bad idea. I would have taken bigger pots like 4Liters/one gallon sized . I use 3 cuttings of the same strain in one pot, or just one in the pot if I only have one cutting.
I would have put them directly outside from the start. Wait, I just did that two weeks ago :) ( cutting in a pot of loam outside ... They call it: sink or swim ).
Mine are in a half shady spot, but getting direct sun some hours in the days - so not full shadow as they need light to grow.
No matter what you try, some may/will fail ...
A neighbor gave me 3 root-shoots two weeks ago - well oh my oh my ... All green growth from this season ... I prefer rooting wood that is one year old - so from last season.
I'm almost sure that those 3 will fail on me because of the type of wood ... but ok, let's try and see ...
Good luck to yours !