I use enough to get about 30% of what was added to drain out the bottom of the planter every time I water or feed.
When I have say, 10L of media I need about 3L of solution to totally saturate it. Everything on top of that 3L is going to drain out the bottom. So if I used 4L of solution, 1L would drain out, and that would be 25% drainage. Thus, I use a little bit more, adding up to about 4.5L.
If I used 4.5L of solution then I'd want about 1.5L coming out the bottom as runoff. Always remove this runoff as it will contain excess and buildup you don't want being absorbed by the media as it dries, as well as over-saturating the lower inch of the media and suffocating the roots.
The solution you described is going to be VERY strong. Over 2.0ec likely. Unless your plants are very large and very lush then this solution is too strong. You could cut that in half (add it to another gallon of water) and you'd still have the same nutrient ratios but at a lower strength. I really suggest you add at least 2L of water to that solution to dilute it a bit. Another gallon would be better.
You probably need 2 gallons of solution to get enough run off anyway... so diluting should work out nicely.