Taken about 2 years but finally got all badges. Grandmaster score chaser was the hardest one for me. Had to complete with 7 challenges to get it. Doom slayer was tough too but when I got the right build I absolutely smashed yog for it.
I don’t know of one myself. I have posted a couple tips on my fedi account, @littletranspunk@kolektiva.social, mainly because I was disappointed I won a game without a challenge enabled.
I was also thinking of making a video of tips for SPD as a helpful resource. I’m no pro, but I have played a couple hundred times and can show what I found useful