Best AR briefing ever heard (and it is on camera somewhere in the London Archives - it was the film I saw)
Along the lines of:
Ref to ARS: "First responsibility is touch, second is touch in goal, third is kicks at goal, fourth is foul play, finally the most important point is - don't make me look like a C@nt"
I still use a version of this - and it works well. If you don't have comms, it is about all you can prepare for, after that, it depends on how experienced and, importantly, how much you trust them. You carry the can ultimately, so if you don't know them, or don't trust them, then you need to assume they are not much better than club TJs. You can always relax this and trust them more as you gain more faith in them, but very hard to go the other way......