Indoor to Outdoor Transplant Grow Help :D

Hi All about to do my summer grow, got mainly Autoflowers Strains
-Samsara Ultraviolet Autoflower Feminised
-Advanced Sweet Dwarf Autoflower Feminised
-KC Brains KC45 Autoflower Feminised
-Reserva Privada Cole Train Autoflower Feminised
-And some other seeds i got from my own buying.

Im Growing Under GROWLUSH 130W FLUORO 25000K LAMP
Just have a few questions, if im starting off the plants inside, whats a sufficient size I should grow them too before I transplant (How much nodes, or height?), I want good outdoor yield so I might just keep the plants on 12/12 inside, Also whats the best medium to grow in before transplanting, for example can i grow in rockwool cubes indoors, under perlite boards, and if so, can I transplant rockwool cubes directly into a guerilla farm setting (Outdoor Soil), or better off growing in pots or plastic cups, and transplanting, and if you can veg them in plastic cups, will the standard white cup size do?

If anyone could help me would be greatly appreciated :D
 
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