I've lost track of what we're trying to solve for OP now LOL.
I reviewed the original 4 questions
1) don't combine edrains
2) drill hole for siphon break
3) the water will drain to the lowest drain pipe. OP needs to test based on her/his setup and sump
4) nozzle will work and this question is related to question 2
I think as we started to answer OP introduced other questions and points.
A
amber1986
did your questions get answered?