I was reading about the strategies utilizing Mandrakes to hide in the enemy deployment zone to score on the Teleport Homer and Linebreaker secondary objectives, but the Black Cornucopians stratagem seems to be setup perfectly for this:
Black Cornucopians- Use this stratagem at the end of your Movement phase. Pick a unit of Prophets of Flesh Wracks from your army and remove it from the battlefield, then set it up again at its full starting strength wholly within 6" of the edge of the battlefield and more than 9" from any enemy models.
Teleport Homer (Action)- Score 4 victory points each time a unit from your army successfully completes the following action: One INFANTRY unit from your army can start to perform this action at the end of your Movement phase if it is wholly within your opponent's deployment zone. This action is completed at the end of your next Command phase, provided the unit attempting it is still wholly within your opponent's deployment zone.
Sequencing- While playing Warhammer 40,000, you'll occasionally find that two or more rules are to be resolved at the same time- e.g. 'at the start of the battle round' or 'at the end of the Fight phase'. When this happens during the battle, the player whose turn it is chooses the order.
The most useful aspect of this is that you can start the Teleport Homer action on turn 1. It looks like it is pretty difficult to get an Infantry unit in your opponent's deployment zone on turn 1 (Advancing Scourges with Fire and Fade have 22"-27" movement for possible turn 1 Linebreaker) but Black Cornucopians is kind of a loophole to the strategic reserves rule.