Depends very much what kind of setup are you running. You dont even know my circumstances, so no, multiple daily feed isnt "the only most optimal" way for coco plainly. Now comments only on the subject please.
You’re not only wrong but you choose to wrongly believe you are right.
In order to get the best performance from coco, or to “optimize” it, it requires multiple fertigations daily. It has nothing to do with your circumstances.
Just because your circumstances don’t allow you to optimize your coco it doesn’t mean there isn’t a better method for optimal output.
If you want to know the optimal hand feeding method for your circumstances that’s completely different then optimal overall. Hand feed your plants as many times daily as you can. If you can only feed once daily then feed them to significant runoff. Allowing dry backs by feeding every other day is just asking for problems with salt buildups and EC spikes.
You can do what you want, they are your plants after all. But you are the one that came here asking for advice.
And for what it’s worth I only hand feed my coco once daily. I’m not optimizing my coco.