Rather than working top-down from your choice of formula concentration, read and react to the plant. if you want to boost the EC, just be willing to accept that any damage you see in the next 2-4 weeks could very well be caused by that choice. If not, then the plant made good use of those extra building blocks.
go ahead, but don't think about it from the perpsecitve of EC. Your "third rail" is the health of the plant. that is your guide. If you give more and start to get symptoms, the plant isn't keeping up with that rate of provision and there is no extra growth caused... and eventually such overfeeding will impedge growth.
There are numerous factors that go into what "EC" will be best for you. E.G. if the someone has a much lower VPD, they will have to feed at a higher concentration than you, all other factors being the same ("ceteris paribus"). Those people may also have their head up their asses and have no idea how to accurately calculate EC or maybe the probe is off by 10% etc etc. some people just plain lie, lol, possibly to themselves.
VPD is a huge factor. if the plant drinks faster or slower, that will impact the concentration you can give. Assuming growth potential is equal between two plants, for simplicity sake, it is about providing same mass of nutes per day that matches requirements of growth. (otherwise you get deficiencies or toxicities).
So, if you want to test a higher concentration, slowly amp up and trust what you see in the plant -- any sign of toxicity and you should reverse course or possibly adjust 1 component etc.
The ratio of what you feed is equally important to overall concentration. You'll be able to push higher if your ratios are 'better.' As part of diagnosis, you may find you can raise overall EC if you also dial back or maintain existing levels of 1 or 2 individual nute components if they are already at the high end with current formula.