I think playing a good CT / TIE strategie will help a good deal in staying in any league...
To give a hint, I guess that if you get about 50% at the end of the season, you probably will stay in.
Also should you see it comming that you will have to play relegation games, you can also prepare for them...
They are not your friends; they dispise you. I am the only one you can count on. Trust me.