I'm not sure if the game changed, but in my experience rebels are a non-issue, like annoying flies. I don't know why so many people recommend Humanist or Religious to beat rebels if rebels are a minor annoyance? Beating the Ottomans in a war? Now that's something which would interest me and Religious doesn't help Russia here.
The only case where I am considering Religious is for a "Fortress Persia" run, hoping to attrition to death all enemies with Religion+Defensive in my mountain forts... but even in this case I am not fully convinced it will work. Let's see.
As Russia despite the initial thinking that this same strategy would be a good idea, it is not. You are mostly fighting on the South where there are no terrain modifiers and no terrible winter. If you, like me, likes to recreate the real expansion path of countries, then you will ally Sweden to safe-guard the north border and will expand to the South and to the East, so there is never any meaningful invasion of your country in the north the whole game...
Historically Russia acquired Finland in 1808:
https://en.wikipedia.org/wiki/Finnish_War
So for Russia IMHO the best is Economic+Quality. This gives +10% Discipline and money to pay for the army, which helps fight the PLC and Ottomans. I don't see how anything else would be better.
IMHO the ideas/policies are unbalanced. Some are massively better than others.
getting CB is trivial, just a little spy time on the area you don't already have perma claim
Even without Third Rome I was able to convert without trouble like 10 provinces in 40 years with the help of Muskovy's +1% missionary strength. With the +2% that Third Rome gives via the Orthodox buffs then .... totally unnecessary.
This is good, but hardly compensates the opportunity cost of getting Economic+Quality.