I have now used The Rock, 352AngelsV2 and 442Triple in saves with Derby signing pretty much the same players or same standard of players in all three saves, here how they have done over the first 2 seasons in each save. Results were pretty close but I think overall I give the 4-4-2 the edge, even though the Rock just beat it for points, the 4-4-2 looked more impressive and had a much better goal difference. The angels tactic was awesome in the championship but I feel needs more specific players to work at it's best and it can be expensive signing loads of good strikers. Not tried the 4-5-1 yet but I am sure I will at some point.
Just finished season 2 using the 4-4-2triple using Derby, pretty impressive. Also won the league cup beating Chelsea in the final and Man Utd in the semi.
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Here are first two seasons using 3-5-2 Angels with Derby (slightly stronger squad in the prem than with the 4-4-2)
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And again 2 seasons from a Derby save using The Rock Classic (Similar strength team to the 4-4-2 team)
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So I hope this might help people looking for an underdog tactic, can't say how the 4-5-1 would do as I only tried that once with WBA and it wasn't very good for them.