In terms of tyres on indoor carpet (Primatrack carpet in the UK, not sure if that's the same everywhere or not?), I've always run minipins or minispikes all round...and always yellows, with inserts all round.
I've always found mini spikes are more forgiving if your setup/driving isn't so polished. When the setup is good and driving is more practiced mini pins are my first choice for 2wd, as they tend to be more grippy.
That's the general theory on mixed carpet/polish offroad tracks I'm running on anyway.
Never tried stagger ribs so can't really comment on those.
From memory running the oil slightly lighter in the rear is another option...on my X6 I use 35wt front and 30wt rear...which is what I used in the B4 before that as well I think. I do remember that I was always trying to dial the steering out rather than increasing it on the B4...and often cut off the inner and outer rows of minipins to tune the steering response with new tyres.
Can't really remember the other setup details I ran, I'm sure someone will be able to help out better than me on that...but ride height sounds about right from memory....maybe a touch higher depending on the track style. Have a chat with the other guys at the club your running at, no doubt they'll be able help out too.
Not sure what the current thinking is on weights with a B4 and lipo...I always ran a strip of lead over the battery and a small amount in the front and rear bulkheads to help with the balance/grip.
Hope it helps!
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