I'm overweight and have the same set up as you.
I believe all bikes come with compression and rebound tune set for the bike and average weight-something like 12 stone.
If you don't weigh that then a tune is a must to get the best out of it. I always go with Tftuned and get it Pushed tuned. I have had success with this on all my bikes I've had from DH to All mountain.
Even though it felt good as standard, i thought it blew through to fast. The Push made it feel like a different shock. Since having it pushed they have now brought volume spacers out. Using the biggest I found it ramped up to harsh, put the smallest one in and it is spot on.
I ride in the trail setting on the front with 2 spacers and pro pedal locked on the rear on any normal trail centre stuff, when pointing downhill jumps, berms and rock gardens open both and it now is very balanced. Air settings will depend on your preferred feel to the bike. I have mine set quite hard which works for me.
Saving settings in a book is the best and keep tweeking and recording.