Ya, root them in the 1.5s and dome till the root system is nice and healthy. I usually wait until i see at least 10 strand of root before putting in to the 4x4s. Then i let them get about a foot tall beforw flowering.
Your plants are so bushy, I almost wanna say just do 9 plants flipped at 12" I bet you'd pull at least 9 oz.
I could go on......... The thing is; all you really gotta do is keep growing. Every day.... Week.... I'm always on to something new. Just weened 6 seedlings off baby food and also sprouted 5 og regular from some local guys. I'm putting some pretty good sized plants outside this weekend finally too. Gotta keep busy. My indoor baby's are looking good @ 3 weeks officially today. I'm pretty happy right now. My plants are the best they've ever been
Id take as many clones as you can off one plant so you can monocrop, use that plant as a mother and flower all the clones with only a week or two of veg. Sog a tray of at least 16. Theres never a guarantee on how much what will yield. Thays why i run so manynin my trays. I could run 9 big plants but theyd take up more ceiling height that i dont have myself and i like to pull almost 2 p per light... my big soil plants i was running, the yield didnt come close to my hydro tray yield to wattage wise...
The clone cubes??? I never presoak, just drop them in some ph 6.0 water as im cutting..also make sure that as soon as you put the cutting in the cube to squeeze the excess water out..
Ya id say they're ok. Just after u put the cutting in the cube squeeze that water out.
Running one strain at a time. But in your case it might benefit you to run some of all 3 just to weed out the weaker strains..