None are particularly good board for what you want to do. But out of the three the Attack Banana and the Impossible would be better than then Magic.
Attack Banana and Impossible are quite similar in shape and kind of the equivalents in the Lib-Tech and Gnu line, respectively. Impossible has different toe vs. heel sidecuts, more tech in construction and is more expensive than the Attack Banana, but they ride fairly similar.
The Magic is quite a different board, much more aimed at slashing through pow and backcountry. Can be quite squirrel-ly on groomers, especially at speed.
Thanks for the response. Ok so the attack banana and gnu are the same execept for some tech and base, and in your opinion your magic is not a good choice. Out of the two what do you recommend being that the attack has an extruded and the gnu has a sintered.