With today's modern parachutes and larger loads, the risk of collisions under canopy has increased. Many of the lessons in escaping from canopy collisions have been mastered by the canopy formation jumpers and are applicable to all disciplines when they open there parachutes. Jumpers should view flying there canopy as they would do driving on a dodgem ride at the fair. With a view that everyone is out to get you under canopy and resorting to a more defensive type of flying being aware of everyone around you until you are safely packing in the hanger packing. The first thing to do after a freefall dive is to get good separation before opening.
Good separation equates to more time to avoid collisions.
When choosing canopies, find out how reliable the models are at opening on heading and if you do choose a model that is frequently giving you off heading openings. This is the point to consult either the manufacturer or rigger and find the cause. Carrying on without dealing with the problem is just increasing your chance of a collision. So you have an off heading opening and you find yourself face to face with a fellow jumper with line twists and unable to steer coming straight at you. Time is short and now is not the time to be thinking about what to do.