the thing with poacher, is that he is a finisher. If you check his primary stats, you will also see that he is a dribbler. That, for one, means not using play through defence shout as that limits his dribbling ability. Second, it means not using adv. playmaker in central midfield, as that will isolate the attack. Thirdly, using a deep lying playmaker that can pass him a killer ball behind the defence to run onto is usually fruitfull. And that is best achieved with high tempo and/or counter attacking ticked on. If using counter attack, you may want deeper defensive line to create space behind the opponent and give the poacher space to run to. Next, he is usually positioned at the near post, so drill crosses in team settings might help if you are using a winger or inside forward on the flanks.