If you have mainly root-feeding plants that aren't particularly demanding, you could get away with having a decent substrate loaded with nutrients i.e. ADA Power Sand and Aqua Soil. This will supply sufficient nutrients without the need to dose the water column daily.
If your tap water has NO3 and PO4, and is hard (enough GH - Mg and Ca) then this could also help.
Fish load and feeding will also help can also help to provide extra NP.
So basically, yes, you can "get away" with less dosing. But the plants still need feeding. Either they take it through the substrate or through the water. In your case, if you want less work with water dosing then you need to have a good substrate and stick to easier plants with good root structures.
In any high-light tank with CO2 I recommend changing at least a third of the water per week. More in smaller tanks or high fish load.
You'll need a good trace fert as well as likely extra K. I recommend Tropica AquaCare Nutrition or Seachem Flourish. Potassium sulphate (K2SO4) for extra K.
All this said EI is the simplest, cheapest and most effective way to feed plants in a high-light, CO2 tank. Even with a nutrient-rich substrate it is worthwhile and will result in less load on the substrate, so it will last longer.
Unfortunately, you want high-light, you need to put in the work, one way or another. There's no such thing as a free lunch!