I give the bad example with my repro since over a year now, but you know the details so you will handle the contradiction ^^
It look like an important step in your journey, mix of educational checkpoint and feelings. I will prepare first a full throttle round to quickly work in decent conditions (thousands of seeds to kill because not enough good for you, instead the choice of Jah on a restricted panel.
Ortega being not specially a hard beast genetically, in being quite fast, i will just push a good round to have enough seeds to start something. I will choose the two more risky pack (age, source, whatever) and launch them side by side. It’s a failsafe to don’t be locked by the pairing first, if ever one of the line don’t give a decent male or female to pair.
Keep in mind that you will have a true predictable grip on the genetic only when you will have your own fresh seeds in hands. So the goal isn’t to enter in selection directly but to build the most unique pairing you can from these two packs. Each backup pures is the ideal, but it’s better to think about the worst cases first and to bullet proof your strategy before having even launched a single seed. “Plan a bloody hell, so you’re dancing when a little storm is coming.” GrandPa quote lol
I will personally play it hardcore in a 2x2. Hardened seedlings, 12/12 direct, full focus, stable regime without any booster (only the base) and continuous germination by batchs.
5x line A, 5x line b, 5x line c, in two batchs if a reunion is planned. So you can catch any opportunity popping on the fly.
You can’t optimize your mapping (launching the 30 and screening them at the same time) without full sacrifice, so better to optimize your chances to make interesting combos directly imho.
Just don’t do it the “'new millenium US style” and respect the heterosis. No more than a double heterosis each 2 gens or you will just smoke a muddy version of what it can give with time to breath between two genetic Armageddon.
Beside the half-taunt it’s a true trick from the core buddy. I’m actually teaching this in real time to my padawan on the Lifesaver, from the other perspective (the mess of a line never stabilized between two heterosis). So in a way fixing what i just thrown as prevention. The LS weed is nice, i like it, but it’s like smoking a vague idea of a weed. Something i’m hating personally.
If three IBLs are aimed, i will make a sequential repro instead by batch of 10. Also in one shot (no clones).
Still the same equation, at this point : you need a fuck ton of seeds, you don’t mind to waste them per thousands for the fun of it.
I know you’re not a label or a breeder, the closet … blabla ^^ But that’s literally the caricature you want to flirt with : throwing an handful of seeds in a bucket of soil directly from the fridge, a little topping, sprayer with 30% strength nutes to maintain the RH … and just picking what you need or want lol Seedlings in natural arrays last longer, giving you more time to dial the stock.