Tranmere came back strongly during the second half of last season after changing their manager, and despite a mammoth injury crisis but had too much to do to catch Lincoln. They seem stronger this season - particularly going forward - and the 9/2 ew I got seemed good value, although the best now is 7/2 which wouldn't appeal.
The relegation prices are all over the place, and only three companies have given prices. I reckon it should be easily possible to guarantee a profit by betting the best prices, but that's no fun so I've taken two so far, both at 4/1 with BetVic (less then 2/1 elsewhere):
Torquay, because they've struggled the last couple of seasons and haven't convinced me they're strengthening significantly
Woking. A strange one because they've sold loads of season tickets for £99 on the basis of getting people through the gates and getting the club through the summer in anticipation of a big investment. *IF* the investment doesn't show up then avoiding the bottom four might be the least of their problems. If it does, then my bet will be a waste.
The clubs coming up all look good enough to consolidate, so it could look gloomy for the smaller clubs who were near the trap door last time, although I've not invested yet.