Watering after transplanting in big pots

Hello,
Me and my friends have been disputing one issue so you might clear us out. Its regarding watering.
We just planted clones in pots of 11l (not possible to do few transplants so we plant to final container right away).We always use automated bottom to top system for watering in flowering but use hand watering now.
Grow is in coco, rule says that there should be 10-20% run off from each pot.
But is this the rule in this case when they are planted right away in final size pots?
So in order to have 10-20% run off in 11l pots we need 1.5 litre water to go through the pot, it dries out in 3 days at least, and that is a lot of nutrients and water wasted on a big grow.
Should we water newly transplants until switching to 12/12 (in a week) until run off of 20% or should we just water them a little bid and more frequently without run off and than just flush once before starting the automated system?
My point is that having run off in 1l cups and in 11l pot is not the same water &ec& nutrient amount for plant, my friends say that is not true.
Any judge here?

Daska...
Hard to have hard and fast rules for coco because it's different in different stages...and it seems that there are many approaches.

I'm on your side...but your partners method will work...just wasteful. I veg starting in solo cup to 1 gal...then to 2 gal. Then only the few largest go to 3 gallon.

The advice I give nubes with small plant in large pot...is to water as if it were still in a small pot. Just a smaller amount directly around the plant. Increase that as the plant grows.
JD

The whole point of run off is to avoid salt build up. You don’t have to give exactly 20% run off. When u see it start dripping out the bottom (say in the 11L pots) just give maybe another litre so it gets a bit of a stream coming out and that’s that.
If u choose to do little waterings cos it’s a little plant in a big pot then perhaps u may risk nutrient lockouts due to salt buildups before leaching is performed.

As long as your mix isn’t hot with nutes and you’re not cranking liquid feed you don’t need to leach.

Thanks to everyone for the help.
Appreciate it.

I grow in coco with blumats and zero runoff. I never have any issues with salt buildup, deficiencies, etc... You don't have to water small plants in big pots until runoff everyday. In fact when I'm vegging I water when when the coco starts to dry out not everyday. I've found that you get better rot growth letting it dry out some rather than keeping it soaking wet from daily watering. Others will say you have to water until runoff daily but from my experience that isn't the case. I also don't mix my nutrients as strong as most and don't use a bunch of additives. I don't flush either.