Good luck, but it's not for me
There are so many unknown factors in doubles matches (motivation, tiredness, tanking, uncompetitive level etc) it makes picking winners seem a little random. And then there's the mess when half the matches in the draw are walkovers (which often happens in doubles draws).
For you information, I have computed the number of W.O on Main ATP Tour in Doubles since beginning 2008.
We currently have 6 out of 243 matches (2.5 %) as W.O.
I think that overall we are far from "half the matches in the draw are walkovers"
All unknown factors you are talking about are true but this may also be the case in Singles.
And this could bring more fun
Let us try and see how it will run next week (this week is a kind of warm-up preseason
I try to tip Doubles in Zagreb to see if this is pure random or if there is any logic behind that