What you're asking here is a very complex question. How you're playing at the 25bb and below stack depth is extremely opponent dependent, and requires a dynamic approach if you want to maximize profitability in these spots. In fact, these situations have a game entirely devoted to them--hypers
To put it simply, you should study a lot of the hypers materials available out there, because they address exactly these things, and even as a strictly turbo player, you'd be utterly remiss to not have them down pat.