Well, that split stem is crazy! You might start an IV drip of fertilizer
I'm assuming you are going to bandage somehow. I would be careful about not binding too tight, you don't want to hinder transpiration. Purple stem looks like genetics, which one is that? My DK has purple streaking, but not as dark or solid as that. I don't see anything wrong with the third plant; it doesn't look pale to me.
All my plants are looking good (except for my Strawberry hybrid, more on her in a bit), they've been handling the heat ok. I think I've been a little 'cooler' than points north. 99 yesterday, 92 today and that's what they are predicting for tomorrow. The bag seed is the shortest at 3' the other three are over 3'6".
Bag
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Donkey Kong up front and Cindy's Blue Cheese in the back & a big ol' CBC leaf
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and the Strawberry hybrid
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She has buds all over, growing ever so slightly. At first I was just going to pinch them out, but that would be over 20 pinches. And now I'm thinking of just pinching the main growing tips, but I haven't done anything yet. Let her ride! In the back of my head I'm writing her off; I don't feel like anything I can do will flip her back to normal veg.
The cuts I took: the one I most wanted, DK, is the only pair that didn't root. All the CBC's took; a pair from the planted gal and a a pair each for the poor plants still in 1g pots. Those baby's are unhappy, I don't even want to look at that tangle of roots. Sorry little plants...