It's hard to answer because it depends on how much worse your team is. i guess you should look at the elite teams in Europe and compare your best players to theirs. Are you kind of on the same level (because eventually you can get there)? Use something for Chelsea. If you are much, much worse, go for the best Luton tactic. The answer I suppose it: it depends on if you are 5 or 15 years into your save.