[Discussion] Armaiden, the Jacker (generic level 7 synchro)

[Valkyrus]

 

1 Tuner + 1 or more non-Tuner monsters
When this card is Synchro Summoned, you can target 1 defense position monster your opponent controls: Take control of that target. If this card is sent from the field to the Graveyard, you can: Add 1 level 3 or lower "Armaiden" monster from your Graveyard to your hand.
 

take this card into account as well, because it gives Jacker more consistency:

 

1 Tuner + 1 or more non-tuner monsters
Once per turn, during either player's turn, you can target 1 monster on the field and apply 1 of the following effects:
* Change the target's battle position.
* Switch the target's ATK and DEF until the End Phase.