I know at my club we have a fairly well set team;
I open up and am fairly aggressive - defend my stumps early on, but if it's loose or there to go, I'll score from it. The lad at the other end scored 28 in 15 overs this week..! But if I work at the other end, it's a great partnership as it means I'm not afraid of losing my wicket too greatly as there is Ben who's going to be at the other end, almost certainly.
Then number 3 - 4 - 5 are all varied. Issue is, is we can collapse as well as any other amateur team - or professional team (ref Yorkshire yesterday) - and I think that's just the nature of the game. I will argue though, it's frustrating when the middle order get themselves out through careless or poor shots. And it's more frustrating if you get someone who leans on their bat at the other end, when you're struggling to get the ball away - if you're not getting the quick single, the pressure just ramps up on you - even if the pressure is released at the other end!
Answer: Box the chimp! Pinch a single - most amateur level fielders aren't going to pick up cleanly, throw in directly over the stumps / hit the stumps - it's like some you hit "straight to the fielder so are a no" are actually singles all day, every game.