This card really interested me when I saw it. Besides sticking it into any Seeker deck, I can see this doing the most damage with Mark Harrigan. As Practice Makes Perfect is a Tactic card, he can use it. With cards like Vicious Blow, Take the Initiative and The Home Front, you're playing 5 out of 30 targets for Practice Makes Perfect.
When you attack, use Practice Makes Perfect. Either you boost the damage with Vicious Blow, get a variable (1-3 ?s) boost with Take the Initiative, or find The Home Front and all-but-guarantee your attack, as well as transfer a damage to your target. Not only that, but if the skill test succeeds, you get to return the card to your hand! Which means you get to use The Home Front twice in a game reliably.