1.Yes,unmarked ,the OI are pre-saved with the tactic ,are not from the assistant
2.The AMR/AML are pure IF ,so I think finish is more important than crossing but if the player have nice crossing skills is a plus ( you can retrain strikers for this position )
3.The two strikers are "twins" in dutties,also swapping their positions. My strikers are complete forwards but the skills I think are more important for the position are strength,composure,aceletation,pace (at least 12-13),finishing and heading ( I use strikers for corner tactic and with strength and heading I score so many goals with them )