I have just been using my own tactics, so I can't say which of the uploaded tactics would be best. However, it seems like most of the ones this year have been designed for and tested with good teams who can score a lot of goals to make the tactic look good. I'm not convinced we have seen a tactic posted that is far above and beyond what anyone can make with a simple, logical wizard tactic, so I think you should just make your own and see how it goes.
I think a 4-4-2 diamond (wide) is a great formation to start with, it works very well in this year's engine. Make it rigid or balanced, counter strategy. The default duties given when you select "4-4-2 diamond" in the formations are pretty solid.
Code:
Poacher* Deep Lying Forward
Attacking Midfielder
Wide Midfielder Wide Midfielder
Defensive Midfielder*
Fullback Limited Defender Limited Defender Full back
(cover)
GK
The asterisks are where you should spend the most money to get the best player available to you. Make sure your DM has anchor man type stats, don't go for a deep lying playmaker type of player (think Angel Palombo not Andrea Poli, just as an example). If you use a different formation, this applies to one of your centremids too.
Some cheap examples off the top of my head (some may have developed better than others at your point in the game)
Anthony Annan
Lorenzo Crisetig
Fabrice Muambo
Francesco Bolzoni
For your poacher, Yannick Djalo from FM2010 is a perfect example. Somebody with high pace and accel who will come to almost any team is what you need. Perhaps one of the bigger clubs has somebody available on a free loan. I can't think of too many specific examples, especially since you must be a few years into the game, maybe Alberto Bueno or somebody like that.
For finding players try using MrHough's player filters or make your own filter with 5-6 main attributes set to 12 or 13. And don't forget to check the loan lists, since you can't afford many players you are better off loaning as much as possible (but you must know this already if you got promoted all the way from BSP).
ps. I agree with OsmosisJones who mentioned set pieces. I don't know the perfect corner play but look around the forums (it probably involves far post). Also, if you can find somebody with high free kick taking, he will score a number of goals for you during the season, and that might make a big difference.