Best Farming Node

You could complete farming with just +3. I completed silver bags farming for the Eli CE which i didn't get using 2 days natural AP regen and 8 bronze apples, 5 silver apples, and 2 gold. Then I went to pyramid with +3 bronze and gold drops to farm and finally got my copy of Eli CE, which took 4 days natural AP regen all bronze apples, 9 silver and 5 gold. This is without buying the boost items. I still have 17 gold apples and 7 silver apples left. So it is doable with just +3. +4 can get you quicker but out of the 14 day event I cleared shop in 1 week, which means 1 week of leveling servants, skills, or farm QP. As Gold bag drops aren't really worth farming 350 bags is equivalent to one MLB Mona Lisa run 40 AP door node

It's hard to give a perfect answer as rng is a thing but when I did the math I believe I ended up deciding somwhere between +3-4 as well so that number sounds about right. With the spawn ce's the pyramid node just ends up givng way more currency drops. My alt was getting like 25 drops on the nodes with only one of the currencies while my main got anywhere from 45-55 from pyramid with both using 100% spawn ce. Sure you don't get quite as much raw benefit using those drop boosting ces in pyramid but it's to damn good.