1) Does the corrupt troop benefit from all the Alliance member's battle power tiles that are in the troop?Yes
No, only battle tiles
2) Does the corrupt troop benefit from non-battle tiles of the Alliance like the red +1 movement power tile?
3) Does the corrupt troop gain movement and other bonuses of any creatures in the troop?Yes, a corrupt troop is still a troop. So if it is linked to a creature, it gains the bonuses of this creature
Yes, althought Osiris is not a creature.
4) Would the corrupt troop gain the benefits of the Osiris creature?
5) Does the corrupt troop benefit from any of Seth's power tiles aside from the Purple Tile awarding +1 strength to a corrupt troop? No, just the purple lvl 1 power tile
Have fun playing,