Its foolhardy to communicate with anyone who has died.
With the exception of Paul, John, Mathew, Mark and Luke or do you include them and the mother of Jesus in this? I get what you are saying. We don't know God's mind and they may not have gone to heaven. They might have rejected him.
However, when there is clear sign that the devil hates someone, like the Mother of God, then it's probably okay to ask her to help you to make sure God hears your pleas, right? An advocate in prayer seems like something God would be okay with, since those who advocated for the help of Jesus to cure their child was fine.
I certainly can't think of a time when I was helped through prayer. I may be forgetting something, but I've had no discernable provable miracles in my life. I would even be okay to have some influence, but what I find is what I thought was help turn into crap in the end. That isn't help, unless it is not meant for the living body, but the living soul.
If that is the case, I don't see how the effort to live more than until it is our time is worth more than simply having food and shelter. Maybe a few friends and enough money or whatever to alleviate or cure some illnesses or diseases would be alright. Everything else is simply evil.
It's not of God and not in lock step with what is important to Him. That leaves out religion, too. We would need to simple live well enough that we are following in Christ's footsteps as much as we are each able and forget about going to synagogue or church because the kind of worship He wants is what we do out of love that doesn't expect a thing in return.
Edit: Just thought of the wedding at Cana when someone asked Mary to ask her son to help them because the wine was almost gone.