BR Mobility Burn

1.) You usually want to go first, double mountaining out front and to one side. Next to the well, you usually want to create a lake for lancer/double collection.
2.) An ideal starting hand would be Grim Guard or Brigand, Shifting Tides, and Gift of Steel. Start the way I said in point 1 and you'll find that you can surprise your opponent by placing a lake in front of your harvester and moving it with Shifting Tides, then buffing with Gift of Steel for an ideal trade and tempo swing.
3.) You need 5 lands total for Grappling Hook. I recommend having a lake next to each well in a double collecting position, then having your fifth land, a mountain, to be in an aggressive spot for red creature drops next to your opponent's face. Try to keep creatures on the outside tile of the well because it's the most likely place that you'll be in reach of an enemy creature with Grappling Hook. If your opponent is not yet suspicious of your shenanigans, try to have a creature in front of your orb to launch a friendly creature into their orb for a massive amount of damage.
4.) Have fun memesters.